If you guys are having Lox problems at Yag just tame the whole herd.
Build up some walls right there and toss tons of berries at them until they're your friends. Doesn't take long, and they're easy to kite being so big. THEN summon Yag.

Friends!
I saw a vid of a dude with a huge Lox ranch on Yag's spawn just letting the Lox kill him. Took forever but they can just about do it on their own (if there's enough of them).