Hi, recently trying out a mesmer and I picked up Mantra of Pain because I saw it in a guide and figured I need to git gud with that if I wanna do top deeps.
However, I've found this spell to be very puzzling. It's a very long cast - upwards of 2 seconds - and it has a 1 second cooldown with 2-3 charges (depending on traits). So what, do I charge this thing every time it's off cooldown? Which would be like every 5 seconds. Then I'm spending 1/3 of the entire time I'm DPSing charging this one mantra. Seems a bit clunky and it doesn't actually seem like it'd do a lot of damage at all.
Whilst I'm sure I can swap it out for something else without much of a problem, I'm still confused to this spell's actual correct usage as the 'usage' section of the guide doesn't even brush over mantras.