Kael Drakkal Mob Regen Rate Too High?

[Maja]

54 bard here just attempted killing Watcher Frozentoe via fear kiting at the zone line to Wakening Lands. Frozentoe was regenerating his health quicker than I was killing him. I realize my dps as a bard is low, but typically mob regen rate is much lower than this guy.

[Colgate 2.0]

yeah the regen rate on the lower level mobs seems way too high, those frost giant beserkers regen 3% or so a tick which is like.. 150-200 hp every 6 seconds