R2T10: Seeing three ganged on the one at the altar, it's about time someone got to the uninjured one, and Dorit's not about to leave a yet-again-webbed Ichibod exposed in the middle of the room. Besides, its high time these jumping, dodging, hard-shelled creatures get splattered. Dorit gnashes on her shield to get herself into a frenzy and in berserker rage charges the mid-room shriezyx with all of her might. Her sword crashes into the beast, just barely missing a vital area between large scales, but still doing a respectable 19 damage.
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IA: Rage ... 30 STR!!! 20 + 4 (bull's strength) +2 (enlarge person) +4 (rage)!!!
FAA: Charge, with Power Attack, at reach. +2 attack, -2 PA.

EDIT: Rolled a nat-20, but the nat-6 wasn't enough to confirm.

R2T9: Popping out from the corner to the back of the party ... facing Bessel and Natalya, is ... Atlatia. No one noticed that there were only two derro instead of three above, and everyone forgot that Paxre stabilized one ... Atlatia. Bessel is taken totally by surprise, and unable to use his gunslinger's dodge, and the crossbow just barely manages to get through his thickened skin. He gets hit in the back of the right shoulder for 8 damage ... a sweet spot between bone and flesh. The area of the wound is very cold, but Bessel takes the bolt out and rubs the wound quickly enough for the frostspore poison to be warmed up enough to take no effect.

R2T8: Natalya, before you had to help Ichibod out of his webbing, you intended to cast mirror image on yourself. Do you still do this? You are side-by-side with Bessel. Do you focus on Atlatia and do something to help Bessel ... even if it is to cast your spell in readiness for attack? What would your move action be? In the main room, you only see the one shriezyx at the altar, which is getting attacked by Jolly, Serafaim, and the Scribe.

Ichibod on deck, The Scribe in the hole ...

I/S
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HEROES: +1 bonus to attack and weapon damage rolls if Serafaim seen.

Ichibod: 28. Mage armor. Shield. WEBBED! Center-room.
The Scribe: 25. Cat's grace. CHARGED! Altar.
Shriezyx #2: 22. East. (13:77). Took 42 fire.
* FRIGHTENED from Bessel's bomb.
Jolly: 21. WEBBED!!! Altar.
Shriezyx #1: 18. (43:77. 9 NL). At altar. Took 33 fire.
Bessel: 16. DEX mutagen. Shield.
Serafaim: 12. Altar.
Shriezyx #3: 11. (58:77). West. Shaken due to Ichibod's fire.
Mistress Khrysm: 10.5. Shield.
Homonculi #1: 10.4.
Homonculi #2: 10.3.
Dorit: 10. Bull's strength. Enlarge person.
Atlatia: 9.
Natalya: 8. Mage armor.