I think a lot of it depends on your conditioning state and also the bell size. When I started SS I used a 16kg and EMOM worked fine but when I progressed to a 24kg I found I needed more time in order to maintain my form especially when I went to 1H swings. I also doubled the TGU time to 2 minutes per rep. Lately I've been wearing a HR monitor and trying to stay in the Maffetone range. The time seems to vary from day to day depending on how much sleep I got the night before, stress, energy levels, etc.