Greetings once again!

I find it quite tough to beat the improved abazigal battle at insane difficutly..although i did manage to kill him twice,I lost(permantly) Immoen&Viccy the 1st time and Edwin the 2nd(Abazigal hit him for 166 dmg,while he had spell trap,magical weapons protection,stoneskin and mirror active!).
Anyway,my party consists of me(lvl 35 berserker dual wielding Auguverdal+5 and Hindo's Dooom),Solaufein(lvls 21/18 with his Moon blade and the Flail of Ages +4),Sarevok(lvl 26 /w the Ravager +6),Edwin (lvl 27,primary mage,Staff of the Magi,Venca robe),Immoen(lvls 7/24,secondary mage,dak'kon zerth blade) and Viccy(lvl 36,Crom Fayer,only cleric).
Problems begin with the massive dmg every enemy can deal,continue with the annoying drakes & salamanders and end up with Abazigal healing almost whenever he wants to.
Once(and once only) I managed this: as soon we entered both chain contigencies triggered(both 1xremove magic,2x abi dalzim) and killed abaz in his kensai form..then as soon as he became a dragon edwin's time stop was cast..and was followed by: improved alacrity,spellstrike,remove magic,breach - then 1x pierce shield and 3x lower resistance..continueing with damage spells: 6x skull trap,2nd time stop, 3 x dragon's breath,7x abi dalzim AND that B*stard only went down to barely injured! I still wonder how my keybord survived...each time I fight him seems worst than the one before..

Anyway,I'm open to any strategy/suggestion..do reply! :)

Oh and of course everyone is buffed heavily b4 the fight..so dont suggest that only :D

I am also having some trouble with this battle at the moment:

One thing I found out is that the Drakes are only level 12 so Greater Deathblow will kill them instantly (strangely the Salamanders must be above level 12 since it doesn't work on them).

Also, I tend to leave Abazigal alone so he remains in human form for as long as possible, he's a lot less dangerous than in dragon form.

I only have a party of two at the level cap - Cavalier (34) and Aerie (25/20) - and Aerie only has 2 level 9 spells so magic is not our strong point. After about five attempts I managed to get Abazigal to Near Death before he Imprisoned me... frustrating!

Some questions:
What kind of damage Tamah's breath attack does? and is there a way to protect against it?
Is there a way to be immune to the unconscious effect of wing buffet?