Magery, Necro, and SW
Honestly, I always thought of a mage/necro/weaver as a summoner and ran this template for a while. What follows is from memory, so things have probably changed.
1. You can have 2 ev's plus all your necro animates up at the same time.
2. One of the spellweaving spells gives a small buff to summons (and animated dead).
3. With high meditation and lich form, you almost always have mana available to blast away with in addition to your summons. (And, since you're in lich form -not mounted-, you can have 2 ev's and a weaving summon in addition to animate dead).
4. Spellweaving pixies have corpses which I believe you can animate???
5. With high level stuff, sometimes you run out of dead to animate, but Word of Death more than makes up for it.
6. If you take Spirit Speak (SS=Necro as Eval=Magery) you rarely have to cast heal.
I think my template was
120 Magery
120 Eval
120 Med
120 Necro
120 SS
120 Spellweaving
150 Intel.
20 mana regen, +13 mana regen from Lich Form (about 30 mana regen total). Lich Form can take you above 30, but there really isn't much return on going above 30.
It was actually a lot of fun for champ spawns and just normal dungeon running. However, your animate dead disappear quickly, and are not as powerful as you would hope. Anything without a constant supply of new corpses really reduces your power. But man, when you get rolling......
Be interesting to see what this plays like with Skeletal Dragons as pets, now that that's a thing.
- human: +2 HPR (hit point regen), partially offsets the -5 HPR in lich form. You don't need to heal self as often when not being attacked. If you don't have Focus in your template, "Jack of all Trades" gives you 20 shadow points. This is equivalent to 1 MR (mana regen) and 2 stamina regen. (If you didn't already have Meditate, your 20 shadow Meditate would be equal to +2 MR. Since you have it, the real Meditate is used instead of the shadow level.)
- elf: +20 mana, a bigger pool of mana than other races. INT 120 would be 140 base mana compared to 120
- gargoyle: +2 MR, you regenerate mana slightly quicker than other races. Never need to take up a pet slot with a mount.