[Psycho]

I've had the same problem, except that I had a seraph with a sickle and was attacked by shadow seers casting magic duel. This one is completely deterministic. I tried it in SP a dozen of times and the seraph never cast returning (always personal luck), when attacked by a group of 3-4 shadow seers. The same goes for golem, but not for a lowly guru mage, who did cast returning. I thought that it had something to do with the fact that shadow seers are stealthy, but maybe that's not true. I also tried it with gurus instead of shadow seers on the attacker side and both seraph and golem cast returning in this case, so I don't think it's related just to hit points. I tried it even with a scout empowered to 2S and again no returning from seraph or golem. I didn't look into the logs though.

My solution in MP was to always script phoenix pyre as the first spell for seraph, but my golems mostly became obsolete.

Anyway, I agree that this spell should never be overridden with another spell if it is scripted.