For s10 what about the champions who have no way of fully benefitting from the cloud drake

Not every champion can benefit from the ultimate cooldown reduction. The three champions that come to mind are Udyr doesn't have an ult and he just get cd on the phenox which os basically another basic ability. Elise and niddalee just change forms and abilities and they can be toggled every 3 seconds. Shyvana is the worst offender because her cooldown and is basically her fury bar. Rest unless specially code it to increase furry regen, it dies fuck all.