IWD2 has basically the same spells as BG2, with only a few missing but adding a bunch of others - some of my favourites include Force Missiles, Prayer/Recitation, and Emotion: Courage/Hope. I'd rather ask the opposite.
It's more of an game engine thing rather than just ruleset, I think. IWD2 uses a heavily modified infinity engine and I think some tricks like Timestop, contingencies etc. are not possible within it. Unless a modder hacks and edits the base structure of IWD2 engine.
Unfortunately IWD2 was made under the aegis of 3rd Edition. Hence the classes and spells were nuked by that particular brand of D&D (not saying one is better than the other) and so it just is what you have to deal with. Same would be the case when/if BG gets modded into NWN2 (which I think is underway).
I know that a while back there was a mod that converted BG2 into 3rd edition. It did not translate well at all in my opinion.
I meant in fact a mod to be used on IWD, i'm just searching a mod for IWD where BG/BG2 spells are added to that game, the high level wizard spells of IWD sucks.
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IWD2 just has nukes and buffs and disables. Bleh. seems like a boring MMO class
I know that a while back there was a mod that converted BG2 into 3rd edition. It did not translate well at all in my opinion.
Druid Spells in IWD are awesome, cleric spells not so much and high wizard spells suck in this game (only monster summoning VII and power world kill).
If any mod to convert BG/BG2 spells (or Planescape: Torment spells that are somehow awesome in high levels) exist, please someone point me the way.
When you made that please let me know