After both boss killed team will be teleported back to where you started at Ruined Temple.
Tank should instant taunt, and everyone must take turns to smoke on boss this part very important to prevent your tank get killed. After tank build enough aggro use Elixir of Fortitude and save your Stoneskin according to the situation "example when there is no smoke on boss".
Ortakna has very fast attack speed same as dark one, and hurts much more compared to light one.
Hands will also spawn on arena, same for light orbs.
All HPS debuff during light room from orbs will be applied.