This actually is unmissable but in case you’re worried that you have missed it (as you’ll likely have all the others well before this), be assured it’s story related and cannot be missed (unlike Draga). As long as you’ve earned the missable achievement for taking down Draga, this will be your final companion you defeat.
You probably don’t need a strategy but just in case, use your slow time bubble, do a few heavy attacks with
or whatever combo you like. When he charges (he glows/shimmers silver) just hide behind a pillar or double jump over him.
You can throw explosive barrels if you wish but it’s slower damage for sure. He does his smashy leap a lot, this detonates barrels and knocks down pillars so stand clear of the barrels (you probably can dodge pillars fine by now). There’s one barrel to the right and left of the main arena with healing apples as well as two down the side path in front of the big door (save a slow time charge before you go in there, as you’ll likely need it to escape as he’s difficult to avoid in small areas).