However many you want, I would guess.

I know it's an unhelpful answer, but I found him rather easier than Moder and Bonemass when I fought him before Loxen would fight for you. (They were tameable, but not rideable.)

I'm not great at combat, either. I'm not exactly a dunce, but I'd grade myself poor to fair. Yagluth's attacks are very slow and telegraphed, and it's fairy easy to see what's coming.

I'm also unsure of how the Loxen would handle when he calls fiery death from above (how well they would survive).

Originally posted by Meow:

atm I got 10 lox in a big pen made at the boss location.

If you mean that you're trying to use lox to kill the boss. I recommend watching one of the yt vids where they take on yag with different creatures. Its tough with lox... 2star wolf massive pack kills him better in seconds if they're right where he spawns.