Overview
The Discipline tree is fully rebuilt in WoW Forever. It revolves around absorbs: 
Power Word: Shield, then 
Divine Aegis, which places a shield on the target of your critical heals. Its values still seem low for now.
Penance, a new talent, is a 2 sec channel that heals an ally or damages an enemy. It also shortens Weakened Soul on its target: you can chain Penance and Power Word: Shield for a very big heal on a single target. A Holy Priest who takes the Shield talents benefits almost as much.
You feel like a Discipline Priest very early, with Power Word: Shield from level 6. Thanks to Penance, the spec levels well, and you are hard to kill solo. At level 20 in the beta, it tops A tier among healers. 
Wand Specialization counts for a lot there: real damage with no mana and without breaking the five-second rule. It could become a must-have in raids depending on tuning, to be confirmed.
Strengths and weaknesses
Strengths
- AbsorbsThe best in the game.
- Unkillable soloAlmost impossible to kill.
- Key utilityPrayer of Spirit, Prayer of Fortitude, Fear Ward, Power Infusion.
Weaknesses
- CompetitionClose with Holy.
- Group healingAverage.
Read the details
You have the best absorbs in the game, and you survive almost anything solo. You also bring key utility: 
Prayer of Spirit, 
Prayer of Fortitude, 
Fear Ward and 
Power Infusion.
On the other hand, the competition with Holy is close, and your group healing stays average.
Key spells
Key talents
- Wand Specialization (2 ranks)+25% wand damage. Take it first.
Twilight Focus (Holy tree)70% chance not to be interrupted by damage.
Improved Renew and 
Divine Fury (Holy)A stronger Renew, and faster Smite, Holy Fire and Heal.- +5% damage and healing on your instant spells.
- A stronger, more frequent and cheaper Shield.
Meditation (3 ranks) and 
Mental StrengthMana in combat and +15% Intellect.- Power Infusion at the bottom of the tree.
Rotation and priorities
Solo:
Power Word: Fortitude and 
Inner Fire always up.- Power Word: Shield before you engage.
Holy Fire to open at level 20, 
Smite before that.
Mind Blast, then 
Shadow Word: Pain.- Your wand to finish the target; recast Mind Blast on a tougher mob, and Renew on yourself if needed.
Healing in dungeons:
- Priority 1:Power Word: ShieldOn the tank; maybe not on a rage tank, to be confirmed.When: Before the pull
Your heals generate a lot of threat: keep 
Fade at hand. 
Dispel Magic arrives at level 18.
Stats
- 1Spell power
- then 2Intellect
- then 3Spirit
- 1 Spell power
- and bonus healing
Order to be confirmed: the exact priority is not settled yet.
Look for spell power and bonus healing, Intellect and Spirit. No order is established. Pick up cloth for Tailoring.
Leveling
At level 20: Wand Specialization 2/2 in Discipline, then Twilight Focus 3/3, Improved Renew 2/3 and Divine Fury 4/5 in Holy, for overall power. With Legacy points, finish Divine Fury, then take 
Spirit Tap in Shadow.
Take the best wand at every step: Enchanting makes them at levels 1, 5 and 13. It saves you from drinking after every fight. When your mana runs low, respect the five-second rule: shoot your wand and stop casting.
Changes compared to Classic
- New talent, channeled healing or damage, shortens Weakened Soul.
- New talent, an absorb on your critical heals.
- New talents.
- 50% regeneration while casting instead of 15%.
- For every Priest.
- Baseline spell, one-minute cooldown.
