I've only been using the MGs when a component is in the orange, on top of that with both ammo nodes unlocked it's more than ample and can even act as more of a light hunter than a harasser/backstabber.
For my personal play style in this mech, when I ran it that way I kept having heat issues where I'd have to peel off and cool down too often... At least for my personal liking. That is, however, a good alt config.