Maybe the Rancor Challenge Tier?
I'm finally at the point where I'm having to seriously farm the things, so if you started this game in 2015/2016 like I did you had a ton of gear stored up to salvage, but it does eventually run dry. We're not anywhere near equilibrium, and getting there requires using far too many refreshes/day.
I understand not wanting to give out CCBs as rewards for tasks newer players can accomplish early on with just a bit of development of the right squad or squads, but were in a place of relic'ing about a toon a week, and so we need about 200 CCBs per week to keep up. With new Rancor happening once/week, adding 100 CCBs to the RCT rewards wouldn't be enough to make equilibrium happen, but it would mean that you could get back to spending a reasonable amount of your regular energy per day on them - 200 energy/day just farming salvage for CCBs instead of 400 would be a nice move in the right direction.