Upper_Krust
Legend
Hi Nightfall mate! 
Making full use of her Divine Abilities (Discounting Annihilating Strike which is broken and should only be allowed at DR11 anyway) Tiamat should win...The Prismatic Great Wyrm needs to do 1500 damage before it can bypass Tiamats Divine Shield and thats only for starters!
Tiamat is about the equivalent of x4 72nd-level Epic characters.
The Prismatic Great Wyrm is about equal to x4 60th-level characters.
Looks like about +4 ECL per advancement (I think?). If so, 6 would take it above Tiamat.

Nightfall said:So you think then a great wyrm force dragon and/or a prismatic great wyrm wouldn't harm Tiamat that much?
Making full use of her Divine Abilities (Discounting Annihilating Strike which is broken and should only be allowed at DR11 anyway) Tiamat should win...The Prismatic Great Wyrm needs to do 1500 damage before it can bypass Tiamats Divine Shield and thats only for starters!
Tiamat is about the equivalent of x4 72nd-level Epic characters.
The Prismatic Great Wyrm is about equal to x4 60th-level characters.
Nightfall said:How about an advanced one Krusty mate? Just curious.
Looks like about +4 ECL per advancement (I think?). If so, 6 would take it above Tiamat.