If you insist on taking personal attacks, I would (and did) slot slug and m30 with full Kinetic Crash. Sure, its more knockback, but it gives me 5% smashing res, 6 KB protection, 12% regen, and 15% recharge. Its dirt cheap too.
You are able to re-get it. If the pack isn't used up fully, you have to delete the power before getting another pack.
I attempted to just use this as a travel power, but having to do the arc a couple times a day(as it was my only travel power), was just annoying and tedious.