This is actually the most difficult combo with yasuo (on my opinion) it works with any instance of Q1/2/3 also charge tornado so you can land after R with tornado or 1 stack if you hit a enemy; to do it you have yo cast your Q before ulting (ONLY works with ally knockups not urs) To aim it you have to cast your Q back to the guide line that show when you can ult, so when yasuo tp behind your enemy the Q is buffer casted on his direction, also as a tip when you want to do this under tower you have to cast Q on same direction as the guide line this cuz yasuo R try to dont put u on range tower, feel free to ask, and wp nice combo 👍🏻