Hmm. Woops, something must've happened when I posted my sixty build. This is what should've come up.
I see no use for mountainous wheel personally. Soulbender is rarely an aggressive class. Alot of their skills are high cooldown buffs with dramatic effects, so I'll mainly find myself turtling and poking with Soul's ridiculous range/ghost step. I dunno, that's just my style.
I did get kalla, I just didn't max it o.o
In pvp those bonuses are reduced dramatically. Maxing a skill might give it a 500% bonus in pve, but only a 50% bonus in pvp. Ghost slash and Phantasmal are a few exceptions. They go up nearly 200%-300% when maxed, a bit more noticable. They both have pretty short cooldowns too. For soulbender skills anyway.
Bremen lowers magic defense by 5280. That's pretty dramatic. Especially since this site doesn't factor in unshackle, which would raise Bremen to level 11 and lower it even more.
EDIT: The stupid site keeps re-editing my build to level 2 ghost slash when I post it.