What is the name of the weapon? I dont recall Lynels having clubs but 78 seems a bit low for what I normally get. I would aim to get 90+ attack weapons from them.
Do you mean a Lizal Club?
Savage Lynel Club, I believe it was called. It was from the toughest Lynel I found in the game (he's all the way to the north up in Hebra, a bit southwest of a shrine)
I couldn't kill him with melee attacks because his weapon seemed to have a too long range for dodging to work.
Seriously, a few times when I dodged to the side and the Y button thing appeared, his weapon hit the ground causing a huge blast before I could actually parry (even though I was spamming Y), causing me to be knocked back and losing like 8 hearts.
Most of the time I couldn't even get the Y button thing to appear, no matter which direction I tried to dodge in.
So I ended up having to waste like 40 fire arrows, 50 shock arrows and 20 bomb arrows slowly killing him from up on a ledge (which somehow he wasn't able to get onto even though there was a slope up to it from the side), all the while he was constantly teleporting away and I had to run down and back to make him reappear.
It was the hardest fight I've experienced in the game, and I can't really say it was worth it for that weapon because it'll break quickly if I try to use it and I wasted thousands of rupees in arrows. But it did give me a sense of accomplishment to finally be able to beat him.
Anyway, I haven't had that much luck with my Lynel weapons. Usually they give other boosts (like Long Throw) and not an attack bonus, and even when I do get an attack bonus it's fairly low.
I did get some pretty good bows though (a 40 something x3 bowand a 32x5 bow, both from a Lynel)
And I had pretty good luck with non-Lynel weapons I think.
Edit: It was Savage Lynel Crusher.