As DPS, for me, it depends. Sometimes there's tough moments where I feel the need to use the Braver Limit, and other times if it's a boss where I'm likely to fill the gauge twice, I'll use a DPS LB at the start of the match. I don't understand the second limit bar mechanic so. :/ As range DPS sometimes I try to use it when the boss spawns mobs. I'm trying to figure out the best timing for these limits myself.