I couldn't improve on 2 off for ages. There's something I was missing but could only see a fairly limited number of moves. Then got it by going what I thought was the wrong long way in desperation.
Ended up on a 1 off at the end, which surprised me as every other short finish was in multiples of 2 and I'd never had less than 2off. Couldn't see where I was gaining this step. Eventually saw the alternate exit and got it spot on, groan.