This Article is currently WIP. Due to technical difficulties I have to redo all the Class Guides…
Playable Races
The Cleric can be played as ELKEN, CENTAUR, GUINECEAN, HALF-GIANT, HUMAN and STONEBORN.
Elken 
Centaur 
Guinecean 
Half-Giant 
Human 
Stoneborn
Attributes
Talents & Skills
Check out this amazing Talent Builder by La Communauté de l’Arbre Clair.
The Talent builder is also listing all Skills.
Promotion Classes
Radical
This is a almost Ranged Damage Dealer cleric build. You will sacrifice healing on several abilities in exchange for damage. It also reduced the soul power cost of your Divine Order (damage ultimate) by 500. You will have increased range (6m), you will gain a power called Searing Light instead of Flash of Light, which works as an interrupt. Your illuminate will not heal buy replenish resources and increase your critical hit chance. Your passive causes your critical basic attacks to reset the cooldown of your Searing Light. Meaning you can spam interrupts with enough crit chance.
Crusader
Your more or less full Healer build. You will have lots of increased support stats, like support power, critical healing chance and critical healing amount. This is the only build that will make illuminate heal group members. And your Hand of the Gods (aoe root) will also heal all friendly targets within it’s deploy radius.
Arbiter
This build is more of a hybrid Crowd Control / Healer build, you will still get support stats like support power, but you will also gain more CC. your Holy symbol will now also knock down up to three enemies when it’s deployed, your AoE has it’s radius increased (double radius), and your Divine Order ultimate (if you choose to use it) will reset the cooldown of several powers. You will also be able to stun enemies, with your next basic attack after using illuminate.
Your passive recovers mana and increases basic attack damage everytime you apply CC. Stacking 3 times.
Source: Calderas breakdown of the 5.8 promotion classes:
Disciplines
The Cleric Class gets access to the following Disciplines.
Adjudicator • adjudicate (attack: inflict holy damage)• rupture barrier (passive: increase damage vs barriers; gain resource) 
Rune Caster • sanctuary (field increase allies resistances)• reactive barrier (passive: attacks randomly add barrier; attack power) 
Lazarus Disciple • grabthar’s hammer (attack: combo stuns an enemy)• suns of worvan (barrier negates fire damage) 
Master Of Maces • skullcracker (attack: stun enemies)• will of the stoneborn (increase crushing resistance; weapon efficiency) 
Shield Fighter • mighty shield slam (charged attack: push back enemies)• brutal slam (attack: reduce enemy physical mitigation) 
Gods Reach • hammer prof, hammer mastery, ranged, ranged tray 
Blessed Symbol • blessed symbol (passive: increase critical healing chance and amount at low health) 
Illusory Shield • throw illusion shield (attack: snares multiple enemies) 
Stay In The Fight • stay in the fight (passive: basic attacks have no cost when low on resources) 
Thornshield • thornshield (activate thorns) 
Stalwart • get behind me (buff: while blocking grant damage reduction to group)• molon labe (passive: blocks reflect elemental damage)