And a few general first impressions:
Also looks like I have to invest in necromancer tree to get +3 to int (as is possible from live currently) from class prestige enhancements, as I'm only seeing a total of +2 from the archmage tree. Unless I'm missing something completely. Though obviously possible to get +4 but that means a fairly heavy investment in the necro tree. Plus there's next to nothing of use to an AM in the Necro tree, especially as the efficient XXXX enhancement in one tree locks you out of selecting that enhancement in the other tree so they don't stack.
And like everyone else not happy about linking wand & scroll mastery to wand heightening. Even if you invest in wizard past lives wands like charm etc are of very limited use - so either improve the benefit or remove the linking of the two enhancements. And improve doesn't necessarily have to mean upping the DC benefit, other things like those available to artificer spring to mind, like percentage change not to use a charge or maybe increase the caster level by 1 - that would have the same benefit as it currently has and also provide a small benefit to both damage wands/clickies and buff clickies.
Also I generally don't use either enlarge or quickening, but to get the enhancements to reduce heightening cost I need to take one and the associated enhancements (currently doesn't seem to insist on you having the related feat to take the enhancement, but i'm assuming that's a bug). Or if you want to be a pure DC caster, then you're being forced to take feats and enhancements you'd have to spend a lot of points on unnecessary enhancements to reduce cost of heightening. Not sure I see the need to link the various efficient metamagic enhancements at all - the points spent requirement should be sufficient.
Have to specialise in damage type in terms of critical chance - which kind of goes against the versatility of a wizard. No, ignore me, you can actually select different types in the tree!
Also agree the +2 for spellpoints for Energy of the Scholar is too much - give a wizard can have 2000 or so spellpoints at level 20, an extra 90 only amounts to less than 5% increase, and in terms of epic levels 90 spellpoints is a drop in the ocean. Either drop to 1 AP or if they could do it as a fixed amount with a portion linked to level I think it would be worth the 2AP, say for each rank taken 20 spellpoints plus 2 per level. That wouldn't overpower it at lower levels, but still provide a useful amount at higher levels.
And just a general comment - please drop the reflex save on arcane bolt, I can understand it for the arcane blast, but as its single target and is unaffected by metamagics its fairly useless at later levels due to the reflex saves mobs have and the number of mobs that have evasion, well its fairly useless on epic in any shape except finishing off something with a sliver of health so if you're feeling generous either up base damage or let metamagics effect it and blast. Its also not as if its particularly useful for triggering Shiradi effects as its single target and one bolt, not like magic missile or similar.
And I won't go into the whole issue with DC casting in general in terms of its ending up like the old AC system between the prestiges enhancements and the epic destinies - you invest totally in the DC of a particular school and every other school is fairly useless, which again goes again what I consider to be the versatility of a wizard. PnP you generally only had a few points of DC between spell classes you focused on and those you didn't. Anyways, no derailing