In fact, your dumbass shouldn't even be talking about full potential. Subbing ninja gives a ranger mucher better agi boosts then subbing warrior, AND you can dual wield weapons with +agi stats.
Anycase, I'll contend utsusemi isn't super useful mid fight to a warrior. The seems to spend more time getting interrupted than anything. It's good at soaking the first 3-6 hits though.


nothing compared to a Paladins sheild 


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