T1:
(1)Noble Lineage: Increase mana regen by .5/sec. Every nearby ally hero increases your mana regen by .5/sec.
(1)Lifeline: Increases the range of
Power Word:Shield and
Devouring Plague by 20%
(1)Life Weaver: Gain 20 mana whenever you heal an ally other than yourself
(1)Blessing of the Light: Anduin can now use
Divine Healing on himself. If you do, reduce the cooldown by 5 seconds.
(1)Merciful End: Shadow Word:Death deals 20% more damage when the target has below 20% HP.
T2:
(4)Insanity: Causes the damage of
Mind Flay to deal 100% more damage on the initial target.
(4)Pain Suppression: Anduin takes 10% less damage from all sources.
(4)Son of Stormwind: Activate to inspire nearby allies with 15% more attack damage for 5 seconds. Does not affect you. (CD 45 sec)
(4)Hasten: Reduces the delay and channel time of
Divine Healing and
Shadow Word:Death by 33%. Divine Healing has 20% more cast range.
(4)Desperate Prayer: Restores 25% of your mana when it falls below 25% (CD 45 sec)
T3:
(7)Perpetual Motion: Prayer of Mending and
Mind Flay healing/damage, duration, and jumps increased by 33%
(7)Pain and pleasure: Divine Healing heals you for 20% of the amount when it heals an ally.
Shadow Word:Death deals 20% additional damage as a DoT over 4 seconds.
(7)Twist of Fate: Power Word:Shield increases ally movement by a stacking 5% per heal for 4 seconds, but can no longer be cast on self.
Devouring Plague slows enemy movement by a stacking 3%/tick for 2 seconds (max 20% for both).
(7)Cleanse: activate to remove debuffs from ally for 1 second.
T4:
(10)Spirit Shell and
Mind Control
(10)Holy Nova and
Fallen Star
T5:
(13)Archangel: For 5 seconds, any healing you receive will also be shared with a nearby damaged ally. (cd 60 sec, prioritizes low HP allies just like LiLi's heals)
(13)Prince of Balance: Reduces the mana cost of
Lightform and
Shadowform by 35. Using either increases healing and damage of your next spell cast by 10%(Duration 5 seconds)
(13)Foresight: Power Word: Shield and
Devouring plague have 33% increased duration and healing/damage. (Devouring plague does more damage/tick and last longer, PW:S heals 33% more than incoming damage for 4 ticks)
(13)Fade: Upon taking ability damage, reduce all ability damage by 50% for 4 seconds. Only triggers in
Shadowform (CD 30, replaces Spell Shield)
(13)Borrowed Time: Increase your movement speed by 50% for 5 seconds, then apply a slow on yourself for 50% for 5 seconds. (sprint replacement)
T6:
(16)Leap of Faith: In
Lightform, pull an ally to your location (long range); in
Shadowform, pull and enemy to your location (medium range) (shares a CD of 40 sec)
(16)Servant of the Light: Allies gain 20% more healing from your healing spells for each Light spell they have been affected by in the last 5 seconds.
(16)Acolyte of the Shadows: Enemies take 15% more damage from Shadow spells for each Shadow spell they have recently been affected by.
(16)Harmony's Edge: Whenever an enemy recently affected by a shadow spell dies, apply both
Power Word:Shield and
Prayer of Mending on yourself.
T7:
(20)Total Control: Both
Spirit Shell and
Mind Control are lengthened by 20%. You only take 15% of
Spirit Shell damage.
Mind Control target now deal 100% increased damage for 3 seconds. Anduin can now move while channeling.
(20)Fate's Epoch: Holy Nova pulses twice, once per second. Fallen Star is now global (affects all buildings, creeps, heroes, etc)
(20)King of Balance: Increase all damage done by 33% while in
Lightform. Increase the amount of healing of all spells by 33% while in
Shadowform.
(20)Storm Shield: shields allies for 20% health
(20)Arcane Power: 400 mana, 15% ability power
I have some critique: When you hear the spell names "Mind Flay" and "Spirit Shell", and you play/have played world of warcraft you have expectations for what those spells do when cast, spirit shell turns all healing into shields and mind flay works Azmodan's All Shall Burn. It's a little confusing when they work differently and do different things on the heroes character. Maybe there are other priest spells that translate better into heroes without having to change them a lot, like Divine Healing could turn into Mind Blast (channel for one second to do big chunk of damage), and put Shadow Word: Death as 6th ability. You can also simply change the names.
You could replace Spirit Shell with Void Shift (switch health percentage with target ally, but Anduin can't go below 25% from casting it).
Or not change anything if you're happy with the spells
Just my 2 cents :)
Overall this character sounds like great fun and unlike other characters with a very unique and cool trait.