It's possible. I was hitting mid 80s throughout 3rd year on a phil degree, but I was already hitting 70s in second year, and I expect that is where the difference is. It is possible, but it will be a big ask to bump your grades up by (in some cases) 20% or so. The usual advice is have an argument, don't waffle, interrogate points fully, and if that means cutting down the number of things you address, then so be it. Quality over quantity.