I do not even know what the Better FPS Mod actually does, so you might need to experiment with it and find out if it works and report back any Issues you get with it, especially Singleplayer Issues, because I assume it is a Clientside only Mod so it wouldn’t be installed on Servers.
Optifine has lovely Singleplayer issues like fucking up my Mob Spawning Prevention for GT6 Stone Blocks…