13/7 11/7 seems most logical to me. his rolls 1-1 2-1 and 4-1 are already really good for him, so the risk isn't that high.
alternative is to play safe because we are 9 pips up in teh race after our move, then we have to play 11/2, but I don't like it so much, it could be right, because we up in the race, and the 7 point might not be so important. Still OTB I think I would choose 13/7 11/7