So, after playing a game recently with my friend (McM vs his Ramos), I think I've uncovered a good way to make these units more awesome.
In our game, I ran the merc up 10" the first turn, after McM (0) Master Surgeon-ed him for a point of WD. This gave him Frantic, which I then used next turn to blow up his Joss in 1 activation on turn 2. If you're not familiar with the merc, Frantic gives him a to attack. I then used the (0) action: for my family, which gives him +3 to duels, :+fate to damage, but you have to sac him at the end of the closing phase. He also has a (1) action that lets him attack twice at -2 cb and it can target more than one model. This effectively gave me 4 attacks at a 5 cb, with a to attack and :+fate to damage. If you have a red joker, you can probably get a straight flip with him and you'll do a minimum of 6 damage to a max of 8. Not bad for a 2 costing comes cheap merc!
Oh, and when he's done, cut him up with McM for a body part counter and a corpse! I can definitely see me bringing at least 1 in any game with McM now.