I hate to tell you this, but you're going to lose, Tuidjy.
Of course I'm going to play without the mods! I'm going to use base Ulm, in all it's early-game ***-kicking glory. I am also going to use a god I have fielded before (really the only one I've ever used with Ulm). I typically play Ulm geared more towards the mid-late game, because I never need any help in the early game. Ulm is just that good early on.
I figure Arcosephale is one of Ulm's biggest threats because of their astral mages (mind burn, paralyze, mind hunt, etc. against low MR units) and their easy access to trampling (chariots, elephants). Having a 26 protection on your wuss units loses it's charm if you're being stomped by an elephant. Also their Heart Compainions are equal if not better than Ulm's heavy infantry, so there's no advantage there either. I think Arcos just has Ulm's number, even in the early game.
Why don't we do this by e-mail? I can host, you can host, whatever is easiest.