First I'm 2 moves off then BAM! I beat it. But then, I realize there's a faster path and cut it to 284.
Edit: 2 tries to rebeat this one. Feels like it's optimized to me.
Reading the rest of the comments, I will say only:
BAM BAM BAM :)))
I see Diab's 276 still stands. Let it stay so, please, cause I cannot do faster then BAM. ;) :)
First I can't beat it again, and suddenly, BAM! 288! Seriously, the path I used made a lot of sense. Just try to figure out which blocks you can live without, then try to pick an efficient path through it.