mispellled

Hey Blasters, I'm a new player who hasn't touched CoH since it was live! I'm not looking for deep cut advice--I'm still wrapping my head around features added to the game well after I left it (like crafting). I have a Pistols/Martial Combat blaster and I'm just trying to figure out how best to *use* Reaction Time. It's a toggle, but cancelling the toggle has a benefit too. Should I just have it on when running missions? Or is this a power I want to toggle on when surrounded by enemies and cancel for that speed burst? Any advice on how best to slot it would also be helpful! It has so many options I'm level 20, learning a lot, and don't necessarily need the "optimal" strategy here--but this power is confusing to me. Thanks!