Ozmar said:
Here is my analysis of this.
Executive Summary: The Epic Wizard is not broken, because what you suggest is a very poor tactic that requires the wizard to put ALL of his eggs in one vulnerable tactic. No wizard worth his high intelligence score would do that. It would leave him too vulnerable to survive.
{SNIP}
Conclusion: Even so, this is a sub-optimal character, b/c he devotes nearly all his resources (and practically all his spell-casting resources) into a one-shot whammy, which, by the way, is not always guaranteed to deliver its damage potential. Energy immunities, improved evasion, or even more prosaic defenses such as incorporeality or simply deceiving the arch-fool-wizard with an illusion or a decoy combine to make this a very poor tactic, IMNSHO...
Ozmar the Epic Number Cruncher
Well, nice math. You know what they say, there are three kinds of people in the world, those that get math and those that don't
Anyway, you forgot a few things, four come to mind that make it a logical combo that you dismissed.
1) Human with a spell prodigy feat (basically starting with a 20 INT for spells) then ad in +25 for level enhancement, +5 inherit and a +30 item enhancement (the max we decided you can go for ability item boosters), that gives him a 80 INT without any Great INT feats. You have plenty of bonus spells
2) By use of the multi spells and the twin spells you are able to do a great manys to get around energy immunity. Before you cast your intensified twined timestop, you twin a Mords on him or twin a dispel magic on his ring of energy immunity. You twin these spells because they might be able to cast counter spells and since you can cast 5+ spells a day, you should be able to push at least one through. Also, if you have Arch Mage levels you can substitue energy types of spells so if they are immune to fire you can do acid. That is also why you need the delay feat so you can use Horrid Wilting, it is a FORT save so you can't evade it and it doesn't have a damage type, so you can't prevent it.
3) At the end of the time stop you cast a wish. There are feats you can take to make it a permenant spell-like ability usable at will once a round, but even without that, you have a few slots dedicated to wishes and you use your wish to wish that you have the effects that you had just rested for 24 hours. This gives you back all your spells and heals you, minus the one wish.
4) 3,250,000 will buy you an improved rod of Excellent Magic that gives you 10,000XP towards a spell. You can use this to pay for twined wishes. You will need two of them at least, so one recharges when you cast the wish, as if you had rested for 24 hours.
So, even though I didn't do the break down completely like you did, I am certain my math is correct so I have to desagree, time stop is very broken. I figiured out a way to do 400,000 points of damage and that was not all of my feats that I could have taken.
It is not a bad tactic either if you get your spells back every round.

Yes, wish is broken too, but a little less abused.