My Big Bang Hero build

.Soul driver is slow alright, but its about the same speed as shout and maple warrior. 250% x 4 is good enough for it to make up for slow animations among having a decent aoe range.

About that, just fyi, Nexon originally made Soul Driver as slow as it is now, and some time later changed the animation to attack like a normal attack and reduced the delay to normal attack's delay aswell which was damn godly, though it only lasted a patch iirc f7, then changed it back to slow speed which now makes it seem sucky, and made me quit my dawn warrior.
Also, now they're going to reduce the 250% to 180% which going to suck even MORE.. Nexon has to nerf everything good.