I don't know, I do the most effective thing for me personally which is shorting TQQQ, as on TS it has not been hard to borrow for me on any days so far. I do not like the way the short ETF's move, I can't effectively day trade that.
I chart NQ futures, but I still mostly trade TQQQ and will also trade QQQ and QLD. This allows me a lot of flexibility as I can be overall short and hold some TQQQ short from higher up and still take some long positions on QQQ or QLD against that.
I will definitely look into this idea. Thank you.