October Revamp Evan bossing question.

Lets say I was bossing Zakum in this scenario.

 Stats

Int:1498
Luk:189(56 base)

Weapon:Ele wand 5 160 m atk with 15% ignore. Epic

% int:around 58.

Range fully buffed(with just energizer Blessing of the Onyx, MW30 and Fury) 30,473~32,018.

At the moment I can hit around 190k per hit on blaze with PI on Zakum Body 3

If Blaze is back to the chain effect(pretty sure it is) obviously using Blaze on the arms would be best correct? Adding Flame Wheel in for some extra damage via DoT. Now once I get to the body, keeping PI on constantly what will be better with my stats and weapon? Illusion Spam using PI when needed. Or spam Blaze because of the elemental increase from my wand.