So... You're kind of all over the place. Now you want Spellwarp Sniper in it?
I agree the build is going all over the place.
At the point I'm adding spellwarp sniper, I see no point in adding more levels from either of the two prestige classes I already have. 7 / day instant metamagic from Incantatrix, 2 more class lists from Eldritch Master. But mostly, I wouldn't really have much to spend the bonus feats from Incantatrix on.
This is funny because before you were all about as many bonus feats as possible. You are completely overlooking enhance spell. Enhance spell increases the dice cap on a spell by 5 to 10 dice and has an adjustment of +4. You can take the feat multiple times increase the cap. So, skip spell sniper, get the extra feats, and use a No SR No Saving throw spell for your base attack spell (IE Orb of Force).
The level 4 base spell does 10d6. I would go Empower/Maximize/Twin/Enhance/Enhance/Enhance. 120d6 maxed to 720 damage. Not as much as your combo, but no SR, saving throw, or resistences (short of a force dragon) to stop the damage.
Assuming you get arcane thesis, two improved metamagics, and you incantrix cap stone it will still only be level 4. You can add more enhances if you boost your caster level higher (earth spell with heighten and reductions from feats works). You can also use Intensify later, but I would make sure you have at least two improved metamagic feats picked up first. And this is all before quicken and multispell feats.
