[Edi]

The question of whether or not the damage from an attack carries over is also settled. Yesterday when playing a co-op Pythium/Arco on Faerun, my friend had a Marignon army attack him and the the AI mages summoned two big fore elementals. They started out as size 6, and after one of them had gotten a few minor nicks, it got into a disagreement with a mind-enslaved Black Hunter. The BH chomped down good on the critter and cut it down to size 4 in one single blow. Apparently the damage roll was enough to completely destroy the size 5 form (17 HP) and reduce it to size 4. I'm not quite sure if it really works like that, it might have been reduced to size 5 (we didn't watch it blow by blow), but the graphic did not seem to alter at all before it suddenly shrank to almost half.

Ironhawk, the different elementals have different amounts of HP, you can calculate the totals yourself from the Dom2 Unit DB I made. You can grab that from Arryn's site.

Edi