Following some advice, I'm now using Power Stance and Precision Stance with my rangers, because in the early game my displayed chance to hit is very low. There is now a 2-turn cooldown on the stances, but I'm getting the hang of managing them, and I haven't had a problem with not being able to switch when I have to. That's not a terribly big cooldown, just enough that you have to think slightly more tactically than you did before.
I turn on precision to hit enemies from afar, and once there are a couple who are hard CC'ed, I switch to power stance to do heavy damage. By the time the CC's end, the cooldown on precision stance is over and I can swap to that. Repeat. Funny enough, I'm making more use of those now than before the toggle.
But I am still early on, I'll have to see if that continues to work.
