Both Judgement and Tempest are amazing with a few blades and a feint, I soloed the death and war oni, with only a Judgement and two blades. I did over 6000 damage. Ten pips, think of that, but add four more pips, what do you get? OP. Then there is Tempest that does about 200 per pip, not as much blading, nor as much accuracy. But it stll makes it all up.
I spent about a few days doing all of the quests in Kroktopia and Grizzleheim just to get my Storm wiz up to level 28, and it was certainly worth it. An Elemental Blade + Stormblade + Windstorm/Storm Prism combo with about 8 pips is enough to make Tempest do over 1k damage. Also base Tempest does 80 per pip, not 200, and by the time you do get it, you can amass pieces of gear that give you at least 7% accuracy, so it'd be about 77%.