Necro/Mesmer thingy-build.

Necro/Mesmer

Wither [Elite]
Mind Wrack
Signet of Humility
Malign Intervention
Ether Feast
Necrotic Traversal
Weaken Armor
Blood Ritual

10 Curses
9 Domination
9 Death Magic
7 Inspiration
4 Blood Magic

Use Wither + Mind Wrack, when they reach 0 energy they take damage and you recast Mind Wrack and Wither. You can use Ether Feast to take some energy from them too. Buff team with Blood Ritual. Debuff with Malign to reduce healing and ruin the corpse, and Weaken to boost damage.

I wish i had thought of this build first but I think their are a _few_ things you need to change.. firstly take some points out of curses and put them into death magic.

Interesting build. A couple sugestions I can think of offhand would be to find something in place of Necrotic Traversal. You'll be using Malign Intervention, and if that triggers, the corpses will be exploited, and you won't be able to use Traversal. You might also want to adjust your attributes some in order to get more effect out of blood ritual- it won't give too much benefit with only 4 points in blood magic.

Hmm, good point. How about Touch of Agony? If I raise Blood it will do some nice damage.