You've lost me now. Usually an evod clearomiser comes with an evod battery. The name evod was first used for the clearomiser, but that's just how many of us remember it.
The iStick 20w is a crazy little box mod and will often burn basic tanks even on the lowest setting.
You could try an Aspire K1, but the amount of liquid is a bit too little for many people.
Aspire K1 Glassomiser - Clearomizers
You could try an ET-S, but my experiments using ET-S and BVC coils was a bit hit and miss.
Aspire ET-S BDC Glass Version - Clearomizers
I would not suggest any Kanger tanks like early model Protanks or mini Protank and stay well clear of things like evod 2 or evod glass... a freshly charged iStick will possibly fry those coils much too soon.