
Warden's Wrath
KICKIn Moonkin form Ruia replaces his melee swings with roughly 48k Nature bolts at the tank, and the cast is interruptible.
Rotate kicks on Warden's Wrath for the entire Moonkin phase, and the tank uses a defensive for any bolt that slips through the rotation.

Lightfire
A beam burns a player with a 6 second Radiant DoT, and when it expires Lightfire Beams erupt at that player's location, ticking roughly 58k per second and silencing anyone inside for 6 seconds.
The afflicted player walks to the edge of the room and drops the beams away from the group, and nobody ever stands in the beams because the silence removes your kicks and healing.

Lightfall
Waves of falling Light energy hammer the arena, damaging anyone within 4 yards of each impact.
Keep moving through the gaps between impacts and avoid dodging into dropped Lightfire Beams or into a teammate's cone.

Pulverizing Strikes
In Bear form Ruia marks several players and launches a frontal cone wave at each of them every 2 seconds for 6 seconds, and each hit applies Pulverized, doubling the damage of further cone hits for 6 seconds.
Marked players spread and stand completely still, because the cones lock onto you and cannot be dodged; the only real mistake is letting two cones cross over one player.

Grievous Thrash
Ruia thrashes the party for roughly 145k Physical damage and applies a stacking bleed of about 19k per second that runs for 40 seconds or until the target is healed to full health.
The healer tops every bar immediately after each Thrash, and players contribute healthstones, potions, and self-healing to reach full health and clear their own bleed.

Spirits of the Vale
At 40 percent health Ruia returns to Haranir form and casts Lightfire, Lightfall, Pulverizing Strikes, and Grievous Thrash together every 8 seconds until he is dead.
Bank bloodlust and every major cooldown for this execute, keep bleeds cleared between loops, and kill him before the third cycle stacks the overlaps beyond healing.