Those calcs are actually pretty pathetic. Only 75% max against Ludicolo? It's not as if Choice Band Linoone can do much else, so if you're using it as a powerful revenge killer, it better do that one job very damn well. And it doesn't.
Why not just use Life Orb Absol which is not only much stronger (it does 97% max to that same Ludicolo), but much better overall? It can't go through Zangoose's Quick Attack which is annoying, but at least it can force it into a mind-game.
Also, Choice Band Return (where do you even fit Return on Choice Linoone?) isn't doing a chunk to Musharna. I'm not sure why you mentioned that it really can't break through Amoonguss but it can do a decent chunk to Musharna when Musharna is bulkier than Amoonguss.