It all depends on a number of factors to me. Usually I will try and get away the something like a 444SL with the 15' clear intermediate head. However; if the swell is heavy and towards the shore this will not allow the fly to get down into the strike zone quickly enough, in which case I might fish a T250 (on a 6 weight, but Xi2) or a full fast sink. It is all down to the conditions.