I dunno about that, ArtQ. It's my understanding that the Thayan Red Wizards don't mess around when they get attacked on their home turf. I think it would make sense that all possible resources would be expended to get rid of this threat, and consider that they don't know wether or not there are more of them waiting on the other side of the portal. Maybe these few are just a scout force to secure the area before the main death squads come through. Personally, I could easily see a bunch of wizards showing up and all dropping souped-up fireballs, lightning bolts, etc. on the party, in addition to summons. And the sic the slaves(monsters) on them when that's done. Think Thayan, think dirty.