I don't even think in those terms. I just go like minraise/3x/4x/etc. Also, a few pointers about HU:
1) Don't limp in HU cash. Like, ever. You gain no initiative and no immediate FE, so that you frequently have to fold when you miss and you're burning cash. Plus initiative can be had for just 1 extra BB so it's totally pointless. Limping in HUSNGs is fine, if you're down to like M<10 so that even a minraise is gonna get shoved over. Don't make it a habit in any other format though.
2) Personally I recommend minraising vs a thinking opponent, lags, and most normal opponents. It gives you immediately good odds to take it down, so that Villain is effectively forced to play a very very wide range or else just let you print money by minraising every button and folding every flop (which pot odds
-wise, you can do if he's folding more than half the time), plus when villain is 3betting maniacally it lets you get away from the bottom of your range for cheap.
3xing is usually done by people seeking a more balanced all-or-nothing-from-the-beginning approach. You can play like that if you want, but it forces you to open-fold a lot more buttons because you're usually gonna get 3bet, you'll run into much tighter ranges, and it's very difficult to autoprofit from a 3x. I will 3x exploitatively
against big whales that just flat OOP a ton and 3bet almost never, so that I give myself more $$$ to take down post. If they don't adjust after a while I move up to 4x and 5x and up until I find a sizing they actually take notice of, then back off a tad.
3) You should open really wide, but it's rarely a good idea to open every button, nor is it really unprofitable to open the button tighter (you're blinded every time, but you're just burning half a blind when you open-fold so as long as you're opening more than half of buttons you're rarely gonna run into balance problems). At minimum, you need to back off your button when someone 3bets, because a 3bet forces you to fold the bottom of your range so that open-raising any two (even just minraising) IS burning money. My general rule is that you should open-fold at least as much of your range as villain is 3betting (so, if he's 3betting a normal 20% range you open 80%, if he's 3betting maniacally at like 35%, you can back off to 65%, and if he's 3betting none at all you open every button).
You can also back off your button further, exploitatively, if he's not retreating from his BB to adjust, because it heightens your postflop advantage and you can profit (if he's adequately adjusting by defending less, you have no increased advantage and are just diminishing your own opportunities to use skill to profit postflop).