Squilla

I'm thinking of rolling this build, love the roleplay aspect of a warlock as well. What makes the Furyshaper better than other barbarian alternatives, just the totems to increase action speed even further? And what stat distribution do you recommend for this spell spammer?

Why is furyshaper superior to the other barbarian subclasses (or no subclass) - just due to the totems that increase action speed and lend to the spell spamming?