Hi everyone!
This is my first time making a mage class, and while I've looked around at different sorcerer builds/prestige classes/spells/you name it for hours, I'm still a bit unsure as what to do. So, I'm hoping I can get some advice specific to my situation.
In a couple weeks I'm going to be playing in a campaign at ECL 10, with a free +1 LA, and I'm planning to be the mage of the party. The theme of the campaign is "Occult Killers" so we're expecting to fight a lot of outsider demons, undead, incorporeal beings, constructs, stuff like that, most likely with increased CR. (Actually, almost definitely with increased CR). (This also means I'm going to have to worry about enemy spell resistance).
Everyone is going to be very optimized - we've got a fully spec'd dragonfire bard (adding at least at least 4d6 per melee hit per person), a goliath duskblade, a warblade/hellreaver, a ranger skirmisher, and a doppelganger warshaper. As the mage, and thus the party's "hole in one", I'm going to be expected to do at least 15-20d6 damage at least three times per day (preferably more than that), so I need to figure out a build that is up to speed with that. :I So...in other words, pretty cheesy, barring nanite armies, Pun-Puns, etc.
I've looked into the Incantatrix, but they seem to be better for Wizards than Sorcerers because of the whole spellcraft check based on Int bit. Also, one of the threads I've read seems to have erratated/nerfed one of the better parts about Incantatrix:
http://www.myth-weavers.com/showthread.php?t=101089 (But maybe I am underestimating/misreading it and the Incantatrix? Since I have literally never dove into a mage class before, I don't know much of the mage lingo unfortunately or how the Incantatrix is put together, aside from persisted buffs and somehow) using metamagic to drive caster levels up to like 25 at level 8 for spells (which, after that errata, is that even allowed?)
I wouldn't mind playing a Wizard, if I can find a race that will give me at least 22 Int and at least 26 Dex. Right now I'm playing as a Nixie (MM1, +3 LA, Small size, 10+Caster Level SR, -5/Cold Iron DR, -4 Str, +6 Dex, +2 Int, +2 Wis, +8 Cha) with base stats 12, 17, 14, 12, 12, 8, 17 before leveling. (Dex is really important IMO, since I need to be on-par with the AC of the rest of my party, which hovers around 26-32 without spell buffs). I would be playing Pixie, but someone already is one and we aren't allowed to have two of the same race in the party. I've asked my DM about the Petal fey race (MM3, -8 Str, +10 Dex, +4 Con, +4 Int, +8 Cha with 60ft good fly speed, DR -5 Cold Iron) but he is not using the +2 LA for the cohort option listed in MM3, so I suspect the LA will be around +4...not sure if that is better than Nixie or not.
Restrictions are: All WotC published rulebooks and official errata (newest published overrules older), 3.5 and non-updated 3.0 Dragon Magazines. No custom items allowed. Everything will be very rules based, so anything for fluff will be almost useless.
So...how can I do this? XD Should I just Wizard -> Incantatrix? Is there any other sorcerer prestige or build out there that can do enough damage/buff/debuff/control? (I'm sure there is, because I've seen my DM (when he was a player) do like 10d6+ at ECL 6 as a Wu Jen, which is inferior to a sorcerer/wizard >_<)