The thing that makes it really difficult, in my mind, is that the mummy has Block. Dodge will sometimes get negated by Tackle on the other team's killers (and in MM that's all you will face), but Block never will, and it's a difficult skill to get. The real question is - will lowering your TV by 90 help you face easier opponents? If the answer is yes - sack it. If no, I would keep the niggled mummy, for the reason that a rookie will go down a lot more often (on the account of not having Block), and will be even less effective. Just my take on it, though - I am not familiar with MM, except by hearsay.