I have a related question that I mentioned in the bugs thread...
When you decided to accept the challenge to play as the Infernal, where do your guys appear? Are they just dumped somewhere on the map in an open area? Do they appear within the civ that summoned Hyborem? I think this is the way it used to be.
The reason I mention it is that in the last few games I have played, the Infernals are spawned in terrible starting positions. In my last game they were plopped into a six-tile area between Varn Gosam and I. I destroyed them in 3 turns.
There was plenty of other places for them to appear on the huge map - at least 1/3 was open, with the entire Eastern border of the Calabim (the civ who summoned them) open. Yet, they get this lousy starting location.
So, what happens when the human player gets them?