Consecration: after channeling it places a golden swirlie, just dodge
Sacred Toll: party wide dmg
Templar
mob will begin to gain buffs that increases their dmg, as mob gains buff tank may want to pop a defensive
Neophyte
nothing of note
Priest
Holy Smite: single target magic nuke
Greater Heal: single target heal on mob
Conjuror
Flamestrike: AOE red swirlie, just dodge
Fireball: Single target magic nuke
Second Boss: Baron Braunpyke
Hammer of Purity: summons golden swirlies, just dodge and stay away of hammers
Sacrificial Pyre: boss channels on a soak zone with orbs, orb count determines how many times you need to soak, once soaked you get a stacking DOT that ticks when you soak the zone and also causes AOE dmg on the party when a soak finishes. Tank typically soaks the zone, however tank may want someone to soak once to let debuff fall if they have no defensives. These have to be soaked or else its a wipe.
Burning Light: AOE dmg + heal on boss
Vindictive Wrath: self dmg buff
Castigator Shield: spawns golden swirlies, just dodge
Lead up to the third boss
Mobs
Paladin
Consecration: after channeling it places a golden swirlie, just dodge
Sacred Toll: party wide dmg
Templar
mob will begin to gain buffs that increases their dmg, as mob gains buff tank may want to pop a defensive
Priest
Holy Smite: single target magic nuke
Greater Heal: single target heal on mob
Footman
Defend: while being channeled mobs will take reduced dmg, use CC, when stopped mobs take increased dmg
Risen Mage
Fireball Volley: party wide magic dmg
Lightspawn
Purification: single target channel that pulses dmg
Burst of Light: at about 20% mob will channel a massive AOE that heals mobs, tank needs to drag mobs out and everyone else needs to get out asap
Miniboss
Braunpyke
Has an aura that does AOE rot dmg
Blazing Strike: heavy tank buster, use defensives
Third Boss: Prioress Murrpray
Phase 1
Holy Smite: single target magic nuke, good to have an interrupt rotation
Holy Flame: drops swirlies, just dodge
Purify: beam that fixates random party member, just run around edge of room
Blinding Light: look away mechanic + unavoidable party wide dmg
Inner Fire: buff that causes boss to pulse AOE dmg + abilities do addtl dmg
Phase 2 (at 50% hp)
Boss jumps up to platform with a shield+ spawns Neophyte with a seemingly unknown aggro table, good to stack on the same spot to cause Neophytes to stack on each other, use CCs to keep the Neophytes away from the squishies. you want to focus the shield until the Neophytes are stacked, then swap to Neophytes. Once Neophytes are dead, swap back to shield.
Embrace the Light: channels AOE dmg
Once Embrace the Light is interrupted, boss goes back to Phase 1 mechanics.