i feel like rammus ult...
should be reworked into a toggle with a time limit which eventually goes on cooldown, similar to corki. (charges)
like say rammus has his 8 second duration ult, which currently hits once per second. with 100second cooldown. turn that into 1 charge accumulated every 12.5seconds.
(in addition 100 mana cost / 8 = 12.5mana per tick.)
this would help jungle rammus clear camps when hes got nothing to do in the meantime but doesn't want to put his ult on cd, but still wants to focus on his farm.
where CDR helps to also increase the charge accumulation rate, but still caps at 8 stacks.
perhaps also consider bonus damage to jungle monsters (just a consideration) to his already slow clear speeds. (not needed, just a thought since he would theoretically have less ult damage potentially in team fights if not at full stacks going in)