Unless your timeframe is strictly intraday, I'd avoid the ETFs. In most cases the futures are trading in
backwardation which just means that next months futures contract is more expensive than this months. So when they do the roll every month there's a slight drag. This is the problem with leveraged ETFs but also a number of popular non-leveraged stocks like USO and UNG.
I'm curious why you think there will be an increase in upcoming volatility intraday?
My opinion as a trader is: markets are random, scalping/daytrading is a hard (some would say impossible) way to make a living. I like to trade options because there are more ways to win. I can collect theta (time) decay even if the price stays fixed.
If for example you think bond yields will increase, then you're bearish on the bond market, so that view could be expressed by buying a calendar spread... eg in $TLT, sell the May $130 put and buy the July $130 put. The goal is that the May put decays in value while the long-dated put decays more slowly. Increased volatility will have an outsized effect on your long July option. You can do that trade for $192 per 1-lot.
But to be clear, that's very different than scalping in and out of a position intraday.