What went wrong?
The Rageborn Passive inside the Druid tree doesn’t work on mobs which have a dodge modifier. More specifically it actually drains your rage when a crit hit gets dodged. This does seem like a bug since you get double punished by missing your attack.
(Rageborn gives 3 Rage on a crit hit w/o cooldown, it draining your rage makes crit heavy Transformation Builds like Typhoon Swarmblade much worse [Druid already suffers from lack of dmg 
pls buff])
Don’t know how relevant this is but:
- this happend in the empowered “Fall of the Outcasts” with a “enemies dodge” modifier
- it happend very often often with “Winged Carrion” and “War Tomb” enemies
- the rage draining moves i used on Swarmblade were Maelstrom via Dive and Typhoon via attacking with Serpent Strike
- the only equipment i got that affects mana is “Culnivar’s Claim”
- i played with another player (a Paladin) who was using Smite and Healing Hands, he also had the Sigil of Hope passive active