My 'plan' for my Night Walker.

Sacrificing Vampire for Flash jump is dumb.

Once maxed, you're going to fall in love with Vampire, so I suggest maxing it as soon as possible. I haven't tried out the Pyramid PQ crap, but in other areas, Vampire is very much spammable. I'd sometimes watch television while I spammed Vampire in a mob (like Mutaes and Roids), pressing my potion buttons from time to time. I'd gain 30-40% exp when I look at at my screen.

Vampire > Flash Jump.

I think it's spammable to a point. But my question here is, is it effective at Pyramid PQ? Because that would be the only reason I'd get it to a certain level to where it hits '6' monsters. Otherwise, it's useless to me. As for pot-costs, I'm not too worried. I have Mesos, lots. This NW will be nothing more than a funfest for me.