It makes enemies in general use their abilities in a 'smarter' way. Like spellcasters cast a while row of usefeful spells at the start of a battle. (for example: improved invisibility+spell immunity: abjuration+spell imunity: divination. This will make you virtually untouchable to spells for a while, cos you can't be targeted (invisible), and the invisibility can't be dispelled (abjuration) or true sighted (divination) )
And that's just one combo...there are a lot more killer combo's,especially at super-high lvls.
But you took an hour over illasera, or what do you mean?

Maybe it's better to not install the other parts then yeah...cos Illasera is usually a walk in the park, for a decentle lvled char/party. You haven't seen improved Demogorgon yet.

Or the Dark Eclipse battle. That took me a bitching 4 hours.
I'm sorry you didn't like it then...but if you want a final battle that's more fun then make sure to install it again by the end of ToB.
