Hey ! Was just wondering if using Act5 merc instead of Insight act 2 merc would be viable if I switch to Redemption for mana regen ? Or even by using Phoenix ?

Thanks !

what do you hope to accomplish with an a5 merc?

you don't need a2 insight merc, just flick redemption after getting some kills. but if you want a merc that deals damage you should stick with a2 and give him botd + a source of cbf