for the past couple weeks, i've been having a meal ~2-3 hours before i workout. Been working 8 hours days, and cant make it to the gym til about 6 at night, so it's fucked up my IF schedule. Anyhow, the meal is small, something like cottage cheese and broccoli, or avocado and a lean-beef burger patty, Something that'll digest slowly, i would still consider it fasted training.
ANYHOW, yes i only train fasted, i do not do any pre-workout specific meals. I do follow 10g BCAAs (scivation Xtend) coupled with Beta-alanine(Now! foods), beta alanine is fantastic, it seems to give me a serious amount of stamina/energy. Honestly, the feeling of being "empty" during a workout is amazing, you get used to it, training on a full stomach sucks in my opinion and i doubt i'll ever do it again. however I would consider myself more physique oriented rather than BB, but i still push decent #s @ 190lbs (squat 375x4, roman-dl 335x6, bench 275x2).
As for the SR, it would be a very useful tool for recovery/muscle building, i think it's reputation is more than made, and would serve as an excellent source of fast acting carbs. As for SWF, i do have a tub, got halfway through it before i started IF. Fasted training is a big part of IF from what i've read, so i'm not sure if it would be recommended, however, if it is in your feeding window, i dont see why it would not work.
Been thinking about including SWF before my heavier days once i've reached my ideal BF%, cuz i do have half a tub left.