if you have enigma, then depends if it's a stacking minion, I find if they have extra fast and it's not a stacking minion, such as heph or a lancer then curse applies very quickly, so might as well go for fanat or conv whichever works best for your build. If you like the stacking guys, then probably go for pulse with holy fire being the most radius. If it's a stacking minion that has range like a venom lord or tainted, then no need for pulse, they apply curse excellently as well.