Perko,
I fish 60 braid on a 10 x 2 spd, I recon its plenty never needed any more drag and have never needed to lock it up. just a lot less weight in your hand when fishing big days
my son fishes the 12 x 2 spd he has no dramas with it size wise
we have the 10 on a 20-60lb custom phoenix and the 12 on a 30-80 custom phoenix, both good red fishin setups