Map: Yeah, I can't do those. RL game, sure, but not online. Dammit Jim, I'm a Dungeon Master, not a cartographer!
Position: everyone was spread out alot in the last round of the Swarm fight. Fairly evenly and in all directions.
1) Rook and Xanfire are in one area.
2) Thorn started in another and *fell* towards the Balor for her attack.
3) Hedron in his area *fell* to catch Thad and hung onto him and rolled an attack (last round), and this round is being pulled towards the Balor.
4) Mal is in another area, near the Balor, because they started together (called, not summoned, so we're good for the Balor's summoning powers; however, he's powerful enough that he doesn't take orders (sorry), and won't hold still for a round summoning a marilith, unless he can get some distance from the others first... which likely means teleport a mile away, summon for a round, then teleport back, so three round delay at most).
5) Thad is in one area, and last round Hedron caught him.
This round we account for the movements in the field, towards Thad or the Balor:
Hedron is with Thad, being moved towards the balor
Thorn moved by the Balor and Mal
Xanfire and Rook
so two areas: Xanfire and Rook, or Thorn/balor/Mal, with Hedron/Thad moving from XR to TBM.
I'm going to rule that Xanfire and Rook are exhausted on Mal's turn, the others are scattered across the field. This isn't a dungeon room, it's a vast expanse of 3D Astral sky.