Depends on what the other character(s) you'd use the gear on happens to be, I suppose. I didn't find B1 to be a hard gear, though he needs a lot of cuffs. At 4*, g11 and a zeta, Blast Em! is doing about 9.5k, and he is assisting for around 4.5k. He gets an inital 25% damage boost from his zeta, though it varies with droid battalion stacks (+50% for 100). It doesn't sound like much, but B1 is attacking every turn so it adds up.