can somebody tell me basilikos refinement i know he as a killer effect but what about the upgrade?

Imagine a world with a max merged Raven with a +ATK-DEF spread, running an effect refined basilikos, life and death in the A slot, Moonbow or Glimmer as a special, reciprocal aid as a support skill, desperation, some random C skill, and in the seal slot...

A third life and death.

Through merging, he would hit an attack spread before buffs of roughly 81/54, and could possibly get a delthea buff to break 90 attack. Put him in desperation range, and he would kill everything on player phase.