Trade this week to enable prems next?

[dicey7]

With mummy potentiallty out for the next month and already missed 2 games so far ive decided to get rid of him, i currently have cox,giles,redden,mumford in rucks.
Im thinking going mummy down to a longer/Orren to inject some cash for upgrades next week. I feel one of those two will eventually break into thier squads.

Doing this will give me around 300K to play with as i currently only have 7k in the bank and i see this as a weakness when i need to upgrade later on.

also doing kennedy to treloar to gain another 90k, This way i can easily straight swap either magner/shiel next week to a pendlebury or murphy.

Sound good? or should i get a more proven ruckmen in for mummy like a kreuzer or roughy
i got 22 trades left atm