My players asked me a good question, and that is, "if the conscious members of a team surrender, but their summoned creatures or golems are still alive, does a team have to beat the summoned creatures/golems while everyone else sits back and watches?" This assumes that the surrendering team does not have complete control over summoned creatures, but that's not a bad assumption. Flesh golems can beserk.
Also, what if someone on the opposing team surrenders because of mind control effects? I assume that counts.
Finally, I'm wondering what Talabir Welik is supposed to do when the ulgarstasta appears. As written, Raknian announces the apostle of Kyuss. If Welik is a stickler he should fight the ulgarstasta and/or Ranknian himself.
Excluding the case of flesh golems, a summoner has complete control over the actions of its summoned creatures.
By the rules of the Games as written, a summoner surrendering BUT not ordering his creatures to stand down would be the same as a warrior surrendering then making a attack. That means disqualification, if I am not mistaken.
Someone making the surrender gesture (kneeling with hands on head, from memory) under mental influence would count, the same as someone doing it of its own volition. He doesn't have a glowing sign on its head saying "Hey, I'm dominated!". It's fair game.
Almost everybody will be a little bit hostile toward Raknian, once he plays his cards. That's a good reason for him to escape at once and return later in EtGR (that and the fact that staying for the planned necrotic explosion is very unhealthy).