Safi'jiiva

Safi'jiiva recovers by drinking nest energy — each recovery consumes that area's store. Pressure it by breaking parts (Partbreaker Lv 3 helps) and using the environment (cannons, the Dragonator, area traps) so it keeps absorbing until the area is empty and it is forced to move on; it can only be slain after the last area is drained. Part breaks carry across siege runs, so switch to unbroken parts for reward value: the chest only breaks in Supercritical and scores highest then — hit it in that window; next break the head fully (it takes two breaks), cut the tail, break the back and wings; leave the legs for last. Hide behind obstacles for its breath. When it rises for Sapphire of the Emperor, hide behind a crag — if none stand, that nova is a wipe. Each nova destroys the rocks it used, so let the ceiling beam or ground ring finish dropping fresh cover before you flinch that animation away; interrupt the rock drop and the next Sapphire leaves no rocks for cover.