Mupen is known to be the emulator without a search cheat function, making RAM searching/watching not feasible. However, there was an external RAM searcher/changer that works for any application, that might have immense usefulness for N64 TASing:
ArtMoney
I downloaded and tried it out. It does not slow down the speed of mupen at all when running, and I was able to use the filter function to narrow down the possible speed RAM address down to 4 addresses. It's there that I ran into problems.
I noticed that even though mupen would be paused, the values in the ram addresses would change every now and then, and other values were in the millions. it did not seem that it was exactly what I was looking for, and it seemed the 4 addresses I found were not specific to the game, because they kept changing even though they shouldn't since mupen was paused.
if anyone wants to download this program and figure out how everything works, and verify that they can filter one address that helps for one particular game, that'd be much appreciated to the rest of N64 TASers that can benefit from a memory watch.