Regarding Bard/Champ,
this class feels a bit laggy for rage management. either you have dwarven ale up and full rage or you have 0 rage. You don't have other rage skills and the passive for ~180% more rage regeneration feels like not working or working wrong, bcs it feels like I have more rage regeneration with rogue/warrior (without the extra rage skill).
Mostly you are not able to do any offhand hits -> no rage
At Jerath event I tested rage management with the result: always empty Oo even with p/b fairy with 20% less rage consumption.
Maybe take a look into this problem
Greetings