Question about sustain on Divine Ire Trickster

Hey friends,

Just built my DI Trickster and loving it so far except I'm figuring out the best way to sustain flask charges. Running with a Quicksilver, Taste of Hate, Atziri's and a Diviners but is there a way to sustain charges I'm not looking at?

Chimera handed my ass to me and I'm trying to figure out how to avoid all the hits.

Is it purely just mechanics?