Cleared it with BLM, but was synced, so probably still had a better stat advantage. But still, never even really paid attention to his health, and he never died on me.
As far as rotation goes, there's not really much to it at 50. B3 when you're low on MP, worth throwing in T3 especially for Thundercloud procs, F3 when you're full on MP, Fire spam until out of MP.

If lag or latency or whatever isn't keeping you from the Link Strikes, I realized rather late that you can get an extra one in with the stack/knockback attack. As BLM, I was content to just get back to spellcasting, still in range, but Noctis warps back in, so, easy chunk of damage from that, too.

Otherwise, yeah, would maybe check gear. If your character is the same as what's connected here on the forums, you've got a lot of stuff wayyyy out of date. You should easily be able to find a weapon of ilvl 100 or so, ilvl 46 is never going to cut it. Your rings need updating as well. As for the left side gear, if you've done your 50 job quest, you should have better versions of pretty much all of that.

Assuming lodestone is correct, gear is 100% your issue here.