Lots of great stuff here (yay metamagics!), and it's clear you guys really put a lot of thought into this. I like the idea of developing a shroud to do what you need it to do. A couple things:

1. I'm not sure how to feel about the positive energy healing. On the one hand, it will certainly make things easier for parties with undead in them. On the other hand, it really doesn't fit. On the whole, I'd really rather see harm scrolls available at the vendors to fix the party healing issue than change to undead healing from positive energy.

2. I noticed that PRR was lost as an option in the revamp. I would suggest changing Deathly Tough to +15 PRR instead of +15 HP. Compared to the other options, 15 HP is pretty much nothing, and the PRR option will be welcomed.

3. I would also like to see additional + to MRR cap in the tree besides T5 Lich form, perhaps in the capstone? The low MRR cap for casters is a killer and keeps them from wanting to wear robes. Bumping the MRR cap to at or near light armor in the capstone would push a lot of people to stay pure and take that. It's not like there are pure wizards running around with evasion. (Side note: Instead of this, you can just maybe change the severe MRR caps?)

4. Necro focus in T5 is still behind archmage, since the archmage tree allows for a total of +2 DCs instead of just +1. Several other caster-focused trees only cost 2 or 3 AP for +2 DCs. Bringing PM into line with that would be nice.