It's probably carbonized by now. Get it hot and spray some Easy Off on it for 15 minutes or so. Don't leave it on too long and rinse it good afterword or the easy off will corrode it.
Only thing holding MLGS back from #1 in my book is how late in the game you get it, compared to most of the colossal weapons you can get early on and then just pump str/vig and unga bunga through the game.
Pair the MLGS special with the phalanx spells and you become a stance break machine. Most bosses will break from one phalanx and two hits of MLGS special.
I did a run with that rapier, its actually really good. It's a twinned weapon so you can power stance it with one or 1hand it, and it has unique move sets when power stanced
Yeah, brotato is my number 1 survivor game. A lot of people gave it flack because it didn't have meta progression. Issue I find with metal progression in most of these games is that its not balanced well and once you get a decent amount, the game becomes a cake walk.
Sorcery is worth a play through, and I'm usually a melee guy, and if you still feel the need to melee some, you can do the best of both worlds and do a Darkmoon Greatsword sorcery play through. That thing is a beast once you get it going.