Mahuxotl's Machination and Crimson power

Just a Clarification. So Crimson power sets your maximum energy shield to 0, eternal sacrifice states When you reach full Energy Shield, Sacrifice all Energy Shield to gain +5% to all Maximum Resistances for 4 seconds. My guess with crimson power this will never activate even though I'm always at maximum energy shield because i cannot sacrifice all energy shield?

As you say, Everlasting Sacrifice never activates in this case.

But you don't always at maximum ES, you just don't have it at all, since it's removed.