Ulrik said:
Wouldn't it be enough to have Arcane Preparation? It looks like a very good combination of Sorcerer flexibility and Wizard metamagic.
Actually, I think a Wizard is better suited for this "play style". You can prepare multiple strategies and especially these can involve more different high level spells (you will have 5 9th level slots including specialization and high Int as a 19th level caster, a Sorcerer would have 7 slots, but only 2 spells to choose from).
And you know quite well in advance what you are possibly up to.
The main advantage of going for Incantatrix is, that you get Improved Metamagic later, which will allow you to
quicken 6th level spells and thus, as you said yourself, the
real save-or-die magic becomes available then. Instant Metamagic will allow you to spontaneously decide, where to apply the crucial metamagics. If you also pick up Sudden Maximize and Sudden Silent (both highly recommended) you have even more spontaneous options.
Something, you should also keep an eye on...
Imbue Familiar with Spell Ability, if you find the time to prepare this, it's like another
quickened spell in the one round that counts.
Contingency will add one more to the tally, or if cleverly used, will almost guarantee, that you get the jump on your opponent.
Against opposing spellcasters, an
Antimagic Field cast on your familiar might be nasty, if the familiar then readies to move close to the caster, if a spell is being cast (or next to you to protect you against a spell).
Of course, you will have to figure out ways to beat an
Antimagic Field yourself.
(Can an Archmage select Spell Power more than once?)
Yes.
And I'm not sure if Baleful Polymorph will do the trick - a canny player might have prepared some spell with Silent and Still Spell to reverse it...
If they make the additional Will save.
But you can choose the spell, depending on the target, that's also, why Wizard is probably the better choice, since you can have more different spells prepared. For example, a
Feeblemind might work well against another arcane caster, or
Dominate Person against a weak-willed Barbarian.
Bye
Thanee