Albion Class Guide

Class: Armsman
Race: Half Ogre is a good racial choice for Armsman because of their naturally elevated STR.
PvE: For leveling the Armsman would want to spec full in Polearm or 2 Handed with leftover points for Shield and Weapon type.  It is also viable to level primarily using a 1hand weapon and shield.
RvR: A typical end game group spec would be 50 Polearm (or 2 Handed),  42 Shield, and 30-39 Weapon type, rest in Parry.  This allows for shield guarding, slam, and also the ability to drop damage.  Armsmen are not a very popular PvP choice on Uthgard currently because most of what they can do can be done by other classes.  Armsman will most likely become more popular when the RA system switches back to "old style" and many hybrid classes lose access to Det.
RAs: LW, Purge, Det, MoB, MoP, SB, can all be good realm abilities for an Armsman.

Class: Cabalist
Race: Inconnu or Saracen is the best choice for a Cabalist based on their higher DEX stat.
PvE: Cabalists are very good PvE leveling classes.  You will want to have 3 points in Spirit for pet power recycle and put the rest into Matter.  You can do a pet focus shield pull along with DOT damage.  This class is recommended for first time players as casters do not need gear and this class is a quick leveler/good farmer to fund other characters.
RvR: A good final spec for a Cabalist is 34 Body, 33 Spirit, 25 Matter.  This spec allows for nearsight which is very strong in the Uthgard setting along with a good debuff nuke.
RAs: Purge, MCL, Seren, MoC, WP, MoM can all be good RAs. 

Class: Cleric
Race: Briton is a good choice for Cleric because of balanced stats.  Avalonians are at a pretty big disadvantage because their PIE and DEX are the same as Britons but with much lower STR and CON.
PvE: While leveling you will primarily want to spec into Enhance for buffs to help groups while dropping a little bit into Rejuvenation to help with healing.  As a cleric it should be fairly easy to get group invites.  Uthgard does not allow for buffbots so you will be in high demand.
RvR: A good final spec for Clerics is 42 Enhance, 33 Rejuvenation.  This allows decent buffs, shears, and good healing.  As a Cleric you will be responsible for buffing, shearing, and of course healing the group.
RAs: Seren, MCL, DI, Purge, PR, Aug Dex are all useful RAs.

Class: Friar
Race: Briton is a good choice for Friar because it is the only choice.
PvE: You will want to keep Staff around character level with the rest of points into Enhancement line for buffs.  Keep in mind if you use a lot of +weapon line items you can boost your buffline a bit higher while still having capped weapon line spec.
RvR: Some choices here.  For a group spec 45 Enhancement, 29 Staff, 34 Rejuvenation, rest of points into Parry.  More solo oriented specs may look like - 45 Enhancement, 39 Staff, 25 Rejuvenation, and rest into Parry.  Keep in mind Friars are not in large demand in group RvR on Uthgard currently so you may be soloing a bit.
RAs: Purge, Dex, MCL, Seren, IP, Det can all be useful RAs.  A lot depends upon if solo or group character.

Class: Infiltrator
Race: Saracen is a good choice for an Infiltrator if speccing Thrust because of their elevated DEX.  Briton is probably a better option if speccing slash.  
PvE: You will want to keep your weapon near your level along with Poison.  Put left over points into Dual Wield.  You can Autotrain stealth while doing this for free stealth points.  The poison DOT hits pretty hard and acts like a self dmg buff.  You can become pretty efficient at soloing yellows/oranges in this way.
RvR: A good end game spec is 50 Thrust, 44 Critical Strike, 36 Stealth, 36 Poison, and rest into dual wield.  This allows for a stun off of evade along with giving you a strong dmg out of stealth opener which is typical with assassin play style.
RAs: MoS, Viper, MoP, Purge, are all handy RAs.

Class: Mercenary
Race: Half Ogre is a good racial choice because of their boosted STR.  Highlanders are also a decent choice because they still have higher STR but a bit more QUI than a Half Ogre.
PvE: It is generally recommended to keep Dual Wield at level with left over points into weapon type.  Anything left over should be placed into Shield/Parry
RvR: A good spec could be 50 Dual Wield, 42 Shield for Slam, 36 Slash, rest of points into Parry.  This will allow a merc to shield slam stun while still maintaining pretty high dual wield damage.
RAs:  LW, Charge, Purge, Det, MoP, are all good options.

Class: Minstrel
Race: Saracen is a good race choice of going Thrust weapon type.  Highlander may be a better choice for Slash.
PvE: There are some options here.  If Autotraining Instruments then you should keep your weapon at the same level as your character.  You will be stuck without anything to really help you until 24. At 24 you will autotrain your Instruments high enough to be able to charm a level 7 filidh which will heal you.  You will then be able to chain orange mobs without any downtime due to unlimited healing.  Alternatively if you spec your Instrument line you can do this starting around level 7 and also have plenty of buffs to offer a group. 
RvR: For full group play you could spec for 50 Instruments and then 44 Thrust and ignore Stealth.  If you are primarily grouping with stealthers a good spec would be 50 Instruments, 33 Stealth, 30 Weapon.  A compromise of the two or for building around smallgroup RvR would be a spec of 50 Instruments, 37 Weapon, and 25 Stealth.
RAs:  LW, SoS, some say MoC for running in 8 mans, some say Purge others will say if you have a pet it will break mez - with all classes there is room for personal preference with RAs.

Class: Paladin
Race: Highlander is a good choice for Paladin class because of their STR.  Saracen have a bit less STR but more DEX for better blocking.  Briton are balanced.
PvE: For leveling many paladins spec a weapon line around their character level while also speccing Shield for stun and defense and Chants for buffs.  Paladins are pretty hardy PvE characters but are known to take awhile to kill mobs.
RvR: A common 1h/shield spec for Uthgard is 46 Chants, 44 Thrust (snare combo), and 42 Shield with the rest in Parry.  A Paladins role in PvP will mostly be guarding weak teammates with shield and interrupting/assisting some support damage while providing buffs.
RAs: LW, Purge, Det, MoB, are all good for a group Paladin.

Class: Reaver
Race: Saracen make pretty good Reavers because the damage is based on half STR and half DEX.
PvE: Flex can be Autotrained to allow for a higher lifedrain in Soulrending.  Some say this is worth it some say it isn't worth it at all.  Keep in mind you will be level 50 much longer than you will be 1-49.  To level with AT I would recommend speccing crush or thrust since slash will AT as well.  Keep weapon around your level with the rest of points into Soulrending and Shield.
RvR: A final spec of 50 Flexible, 42 Shield, 41 Soulrending, 6 Parry can be achieved with Autotraining.  This is the strongest spec that Reavers have.  You will primarily be on the Assist Train slamming things and hitting Levis from behind.  With shield spec you can also be guarding weaker group members.
RAs:  LW, purge, det, TWF, MoP, are all decent RA choices for a Reaver.

Class: Scout
Race: Saracen is a good choice for Scout because of their DEX level.
PvE: If Autotraining bow you will want to keep your melee weapon at the same skill level as your character while dropping the rest of your points into Shield.  Alternately you can primarily spec bow to level along with melee weapon.
RvR: If Autotraining bow until 48 you could spec Bow 50, Shield 42, Stealth 35, and the rest in weapon.  If you want a melee oriented Scout you could spec 42 Shield, 41 Slash, 36 Stealth, 35 Bow.
RAs: LW, purge, MoP, Aug Dex, MoS, are all decent Scout RAs.

Class: Sorcerer
Race: Saracen is a good choice for a Sorcerer because of their DEX level.  Inconnu are also a decent choice.
PvE: You want enough Mind to charm the max level pets, but want enough into Matter to reduce damage variance on dots while leveling.  There is a good guide for Mind/Matter speccing within this thread.
RvR: Some spec options here.  Going 39 Body, 37 Mind gives yellow of all the important spells.  Going 45+ Body, 24+ Mind gives a higher body DD but lower AE mez.  47 Body allows for the red dex/qui debuff.  As a Sorcerer you will be in charge of CC (mez, root), debuffing, and range dps. 
RAs: MCL, Seren, MoC, WP, MoM can all be decent RAs for a Sorcerer. 

Class: Theurgist
Race: Briton is a good choice for a Theurgist because of their balanced stats.  Half Ogres have very low DEX and Avalonians have very low CON.
PvE: Full Ice is very good for leveling.  A Theurgist can typically kill a yellow spirit vulnerable mob with 2 Ice pets.
RvR: 40 Earth, 36 Air is one of the better PvP specs.  This will provide pulsing blade turn as well as AE mezz and decent range caster dmg and stun interrupts.
RAs: MCL, Seren, MoC, WP, MoM can all be decent RAs for a Theurgist.

Class: Wizard
Race: Briton is a good choice for a Wizard because of their balanced stats.  Half Ogres have very low DEX and Avalonians have very low CON.
PvE: Wizards are fairly broken on Uthgard ATM primarily because of how weak bolts are.  Fire is mostly bolt based and earth has some bolt and gtae functionality.  This leaves single target fire or AE ice as viable specs.  If you have people to group with leveling as Ice is probably the best bet.  If you are doing a lot of soloing Fire would be the best option.
RvR: Fire is really the only viable PvP line Wizards have.  Keep in mind if you play a Wizard you will be playing the underdog.
RAs: MCL, Seren, MoC, WP, MoM can all be decent RAs for a Theurgist.