I'm currently leveling a Bots/Emp MM who has both the basic gun attack that comes with Bots [whatever that's called] and Arcane Bolt. I normally just set for bodyguard mode and run in first, gun- and bolt-blazing, and she feels pretty scary on top of her pets. I mean, if you want 15 attacks, then yeah, that's not going to work, an MM is a support class character. I suppose one could really skimp on the support power set and go for more attacks though.