So having an Illumian Barbarian (Ferocity) 1/ Ruathar 3/ Wildrunner 1/ Cleric 1/ Wizard 5/ Rage Mage 1/MotAO 7/Frenzied Berserker 1 would work as a 20th level build, right?
Feats would be tight, and flaws might be needed, but as long as you have the following: Frantic Rage at 9th, Reckless Rage, and all the prereqs sorted out, you should be fine.
Using the Illumian Word that replaces your casting stat with dexterity for the purpose of bonus spells.
Alright. Barbarian, Wildrunner, Rage Mage, and Frenzied Berserker all have a different type of Rage they can whip out.
Frantic Rage converts Str bonuses to Dex bonuses.
I've calculated that you can achieve a 46+ in the stat you use to determine your bonus spells, and you have CL 20.
You won't get off too many spells, unless you have some way to lengthen the time in a rage considerably (I think the maximum is 11+Con modifier, and you get at least 10 Con from this trick.)
So that comes out to:
5 1st, 4 2nd, 4 3rd, 4 4th, 4 5th, 3 6th, 3 7th, 3 8th, and 3 9th
or, to extrapolate the table, more like
5 1st, 5 2nd, 4 3rd, 4 4th, 4 5th, 4 6th, 3 7th, 3 8th , 3 9th.
And the best part? Since you don't cast the spells from the spellpool from your own slots, you can just grab a large amount (think as many as you can cast in a minute) of 9th level spells basically for free...
Using the bonus spells only, 159 spell levels can be exchanged. The fun part is, if you've taken extra Rage, you can do this 3/day. You have a week to pay off borrowed spells.
That's 3339 spell levels you can gain as a full round action.
Can someone say Arcane Strike?
That's +3339 to attack rolls, and 3339d4 extra damage. With my pinky.
Damn that's a lot of d4s.
8347.5 damage on average. With every attack. Why yes, Haste, I love you too.