Hi,
Yes, thanks for correction, I meant pLock VOL = -64.
I don’t really understand what you mean by “per trig basis”, you can silent one or more trigs on a track and " unsilent" them with the dedicated scene(s). I guess its a bit like the one shot trigs trick but with scene-lock.
I’ll take an example (the way I “discovered” this trick)
This is only for sequenced tracks with one-shots I guess,
Say you have all tracks used for a pattern, but you want an additional hihat line to be played on top at some times (but not playing when no scene is active), you can place sample-locked and silenced trigs between, say, your kicks in the kick track. Then have a scene (or more) for which XVOL is locked to MAX for this track. When you don’t use this or these scene(s), you don’t hear the hihats (kind of muted), and when you need them, activate the scene with the xvol lock.
Hope I’m clear. This is not the “ultimate trick” but can greatly enhance the live joy 
