I can see the use for the other 3 Mantras, heck I use both the stability and condition clearing ones regularly, but I can’t really see Mantra of Pain being exceptionally useful. It lacks, according to the wiki, any scaling with weapons or power (no skill coefficient) and while it can be nice for its ability to be used during any other action for some added burst it just doesn’t bring enough to the table to seem worthwhile. Maybe if it had a 1s knockdown, launch or knockback it might be a fairly decent CC skill.
Any thoughts? I’d be glad to be wrong but right now it feels like a dead skill that I’ve never seen used.