And if you can afford it I would grab Fifita and Taupau. Both play 13, both looking really good fantasy wise and should make a big difference to you overall scores. You would effectivly be swapping G Jennings and Isaac's scores for 2 50+ guns...
Then next week I'd look at getting some cows. Martin could be a good option if its true he's getting an edge starting spot. But theres a number of others including, as you say, Cogger. From memory Isaako
's BE is quite low too, so you can wait a week on him and I think Hiku's is too? Hike is actually going fine though and with SJ and Harris back I think he's a very serviceable C for a bit yet, until you deal with the other issues anyway!