if possible, I feel that making whatever the Equip Powers become and any extra effects put on the primary attacks would be things that only benefit the MM and their pets (directly). This allows the abilities to be balanced around being stronger, prevents the abilities from just becoming "More support abilities" (as the MM already has access to these in their secondary), and reinforces the importance of the pets. Ideally, I feel that a MM should be a viable damage character (not strongest, but respectable) just from using their primary set abilities
Of all things, lowering the end cost of these abilities is the easiest thing to do 😛