Howdy,
I'd isoraise pre. That would mostly allow you to play HU IP against CO not even counting times when all players fold and you collect dead money.
As played with limping pre BB can have any two, that includes 22/33/23/Q3/Q2/FD/SD and against that range we are ahead, but raising can push worse holdings out as he is overall tightish and not too aggro, so when he leads - he has a piece to catch on. Raising flop costs us about the same if we call flop and turn, but that would allow him bet worse hands and let us see his action on river. You wan't to see showdown, not play for stacks here as we have no idea where our hand stands.
Good luck!