I did NOT have fun on this puzzle, but after 2h of fail on Saturday, I ran out of rage. From then on it was...tolerable. Thanks to Lokapala for the shard. It makes the puzzle much easier. As Tig says, I had a lucky run that got me to the last stair, after which I realised 'I can do it!'. That made me spend another hour and a bit to get back to the end. Fortunately I'd watched the youtube so many times I had no problems with the final jump to the tower.
One good thing has come of this though. Holy shit, am I better at jumping puzzles now...