life stealing mesmer/necro

I liked life stealing a lot, so Im thinking about this build.
Mesmer/Necromancer

Attributes:
12 Blood Magic
12 Inspiration Magic
3 Fast Casting (P)

Soul Leech (elite) or Offering of Blood (elite) - Blood Magic
Life Siphon - Blood Magic
Ether Feast - Inspiration Magic
Blood Ritual - Blood Magic
Vampiric Gaze - Blood Magic
Power Drain - Inspiration Magic
Demonic Flesh - Blood Magic
*free slot*

I havent played yet, so dont blame me, Im a noob. Thanks for the input guys. i had that idea also, this was my layout.

Class: Necromancer / Mesmer

Assumed items:
+1 to Soul Reaping
+2 to Blood Magic

Attributes: (cost)
Soul Reaping: 10+1 (61)
Blood Magic: 12+2 (97)
Inspiration Magic: 8 (37)

Total attribute points used: 195/200


Skills:
1) Channeling (availability) - (5,1,15) For 33 seconds, whenever you cast a spell, you steal 1 energy from each nearby foe.
2) Shadow Strike (availability) - (10,2,8) Target foe takes 46 shadow damage. If that foe's health is above 50%, you steal 46 health.
3) Barbed Signet (availability) - (0,2,30) Sacrifice 10% max health. You steal 58 health from target foe.
4) Soul Leech (availability) (elite) - (10,2,15) For 10 seconds, whenever target foe casts a spell you steal 76 health from that foe. This is an elite skill.
5) Vampiric Gaze (availability) - (10,1,5) Steal 58 health from target foe.
6) Unholy Feast (availability) - (15,1,30) Steal 38 health from each nearby foe.
7) Vampiric Touch (availability) - (15,34,5) Touch target foe to steal up to 70 health.
8) Life Siphon (availability) - (10,2,2) For 24 seconds, target suffers health degeneration of 3 and you gain health regeneration of 3.