ShiKage's Infighter Build

your 3rd job build is very nice... I may just do that as my build. My one question is:

Is energy buster really good? It seems to me that it's just another mob skill, but if i went with energy drain it would be like a "drain" for a sin (less pots maybe?).

I have no knowledge on the matter. Like a few have mentioned before: it would be helpful to include reasoning =P

Edit:

thanks other dude =)