Guys, please tell me you're able to make all the mercs available for hire at the same tine. That element would really bring some fun play. Are you even considering ? Is there going to be SP version of Sigma ? If so maybe you could make it exclusive to it, because 8 players with four mercs is 32 fighters + all the summons. I bet it can be balanced easy so np for you moddres. Also I wanted to ask is it possible to add additional TYPE merc in act IV ? Like for instance Assassin merc or any other class merc or even add some kind of demon who is willing to kill his own people for money. Maybe you could hire/resurrect him with special currency like gems or runes.
Also do you consider too add fights with Tyrael and all the other angels like Hadriel and Izual's spirit? Something like the barb challenge but with angels

I've seen some guy made even Deckard Cane a boss and he was pretty dope and OP. Maybe make Tyrael for merc or whatever other npc you want.
Can anyone explain how hard exactly is to make the 4 merc hired at the same time and one completely new for act 4 ?
I mean I know is hard but it's not impossible. So what are the steps to get the 4(5) mercs ?