I think she can have it on for most of the first seven rounds, if you don't use any other force points:
You shouldn't need it in round 1, unless engagement happens very quickly (probably only if you're playing against a deep-strike squad)
If she does it at the start of round 2 -> then activate her last at the end of round 3
If she does it at the start of round 4 -> then activate her last at the end of round 5
If she does it at the start of round 6 -> then activate her last at the end of round 7
So as long as you're not getting badly out-activated, you can have it on continuously until the end of round 7.
She's virtually an auto-include for a competitive
OR squad. I agree she's powerful and arguably undercosted (but in a faction that needed it) - but other factions also have powerful and virtually ubiquitous commanders/support. Like you're almost always going to see Ganner Rhysode, General Rieekan, Thrawn, and Doombot in their respective factions, so there's no reason why Old Republic can't have a go-to person as well.
And there is room for diversity in her support - I've seen people using Atris/Echanis, Crusader/Revan, Revanchist/JBMs, and Mira Cannon with her, so there are lots of different options.