I love the Pathfinder community. You guys rock.
I don't want to hand them the fight I just want them to feel like thier lives are indeed threatened. Even if a few players die that is ok, most of them have at one point during the adventure path anyhow. I just prefer to not TPK them.
Wind wall and fickle winds were the spells I was looking for. I do plan on splitting up the party via prismatic walls, forcecages and force walls. I just know that thier priest of Desna is going to dimesional hop them straight out. This is good though because it is starts to become damage control rather than the party being on the offense.
I'll check out the swipe spell, I can see how the lake of fire could really be used to the ememy's advantage in numerous ways.
I also like the idea of grounding them they love to fly around and get huge movement advantages I'll look into this. The larger room is something I'll most likely do as well.
The party wizard has an exceptionally high initiative and he has time stop as well, he is an intellent player and will also use many of the same tactics as BBEG (time stop, prismatics, forcewalls, quicken rod, ect).
Spells I know the party will have going are:
Protection from evil (no suggestion or charming these guys), mind blank, resist energy fire, acid, cold electricity communal, mass fly, holy word
The party wizard loves his dazing spells and likes to summon lightning elementals to disarm opponents.
Thanks all, I will take each and every one of those ideas into account, I like most of them, your feedack is really helpful and I am very greatful for your input.