Yep, now if someone ever says "Wits trumps all", you know why. The tougher a fight is, the more important it is that you go first. Usually when both sides are really strong, it boils down to who lands the first hit. Just like how in HOMM3 Speed becomes more and more essential the later in the game you are.
But anyway, sometimes a slight change in your party state might result in totally different responses from enemies. So let's say you get to go first and you aggro Lucian, it's possible that he won't go for the others of your teams. If you can go first you can even disable Lucian and deny his turn if your character has good damage output. The easiest way to slow him down is probably by teleporting him somewhere far away. A slight difference in elevation can result in a big increase in spell range, so you can actually teleport him quite far back.
At least that's what I did the first time I did this fight. Teleporting Lucian away made him waste one turn. After that with Lohse's Inner Demon Terrify + Savage Sortilege it wasn't hard to get rid of his magic armor and then I just charmed him, or whatever. I don't know what members you have and their builds, so can't really give any more specific hints.
Last edited by Try2Handing; 28/07/18 04:13 PM.