When not using it on big trash pulls, if I don't need to save it for the second/third bar, I may use it as soon as the fight starts. LB seems to build faster in boss fights anyway so you're gonna get a big chunk back by the end (not to mention some bosses specifically reward LB progress for properly doing mechanics). When I think we'll need to save it, I'll wait to use it at specific points: i.e., watching for mechanics. People can spam "LB!" at me all they want, I'm not using it when I know the boss is about to do something that'll either A) nullify/waste it or B) kill myself and/or others because I'm too busy shooting my lasers to move.


As Healer specifically, I am fully aware the party is nearly dead, but I'm also fully aware when to actually use it. No sense in me locking myself in a fancy dance for 10 seconds while the party gets up to die again, and then now so am I so I can't re raise. If the temporary invincibility applies to the healer LB3 then it's astounding how fast people still redie.