Is there any way we can make mor cleric attaks?

[a.L]

My vampiric strike heals less than 20% of my total HP when I have a cleric buff. It might be a bit more useful for solo, but when I have a cleric I find that my cleric casts heal right when I use vampiric strike most of the time, so I only end up healing like 100 HP with VS. xD

And when you use it as a final hit to kill something, you don't get the healing bonus at all. :/