I thought you highjacked my team for a second. In dynasty, I also lost CMC and own Chubb and have been approached by the Robinson owner for a possible deal of Robinson and Sutton for Chubb.
I feel your pain because I don't know what to do either. If Chubb comes back week 8 like the previous person said, he could have huge numbers. In your situation, I think I wait and keep the Robinson production until CMC is back. If the CMC thing lingers at least you have Cook and Robinson, they are healthy.
How many RB can you start?