[Yvelina]

Caelum is strong, but I think Pythium and Vanheim are better in most multiplayer games. Caelum is quite limited... I am abusing Caelum in a game of mine. He seems to be powerless against something as basic as Banelords with charcoal shields and copper plates. And the Tartarians are about to roll off the assembly line.

Yes, Caelum combines powerful research with combat mages that quickly come into their power... But Caelum players who don't look beyond that are easily overpowered. I guess I have been lucky enough to never face a good player using Caelum - is it me, or do the best players avoid Caelum?

As for the strongest MP races, in my book they are:

Pythium/Vanheim
Caelum
C'tis/Abysia
Arcocephale