Commander pairing for kvk2

I would need some advance from experienced players. I finished kvk 1 and am closed to start kvk2. I used Sun (expertized) + YSG (5315) during kvk1. What would be your recommendation for kvk2 ? Stick to the same pairing ? Or do something with my ~200 GH. I have most of my gold key commanders at 4111 or 5111 (except CC at 5151).

I thought maybe going for a Martel 5511 and YSG 5515. And once I can do the commander swap, changing Martel to something else at that time.

Of course I am F2P (VIP11) so not expecting to do miracles but just being able to at least compete a bit and do my part.