Bozos, how do you kill stuff? Vamp Gaze isn't that powerful, Suffering only deals 2 pips of health degen, and Feast of Corruption does soem damage, but not enough to kill using only that skill.

Vamp gaze: about 70
Suffering: 4hp/second
Feast of Corruption: about 80+40
Desecrate Enchantments: about 60+20
Suffering, Feast and Desecrate go in first, and then, when the enemy is attacking, Enfeebling Blood. When available, cast Vamp Gaze. There's also a special thing about my equipment, normally I walk around with a staff that has +13 energy, but when in combat and energy is needed badly, I switch to a truncheon/idol combo that gives me +37 energy at a cost of 2 pips of regen. That allows me to cast Desecrate and Feast again in a fight against high-hp enemies. It's not as directly as killing them, as lasting them out. With me having 600 hp and health regen of 7, and them doing only 33% damage, I last a pretty long time. There is also a second build I also frequently use:
1. Awaken the Blood - again, amazing
2. Vamp Gaze - for dealing damage fast
3. Signet of Agony - so you loose some health to hurt them, big deal
4. Plague Sending - after SoA, make them bleed instead of you, also useful against enemies that do conditions
5. Life Transfer - as blood renewal, but better
6. Demonic Flesh - keeps alive some more
7. Enfeebling Blood - more time
8. Shadow of Fear - even more time

With this build, you're up close and personal more, so the last two are absolutely imperative to keep you alive. The only skill tradeable here is Awaken the Blood, but only if I really really want to solo somewhere for a skill. Which I rarely do. The same is with the first build, the SoC should replace the first, not the last skill.