Is it possible to get Optifine in this modpack? If so, how? (I don't need a fancy video to help, just a guide on where to drag what)
Optifine is not supported at all in this modpack. I have tried all the current versions and there were zero FPS gains, nor was stuttering reduced at all. It came with a truckload of visual artifacts and glitches(Especially with TE). I highly recommend staying away from optifine with this modpack. But if you must try it, all you have to do is drop the optifine jar(or is it a zip?) in the mods folder.
