Keep your death mages away as well; anything Death-3 or above risks casting Soul Vortex. If you play Jotunheim, keep your Seithkonas away from your other troops because they're not cold-resistant...
Still, it doesn't beat some of the nasty own-goaling I occasionally saw in Dom I. For instance, I've seen my air mages skip the "Thunder Ward" part of a script and instead go straight to "Wrathful Skies". Ouch.
