MCH and BRD got extra support because DNC was just too bonker to hope competing with.
We have around one time where Warden's Pean is use per expansion, let's not count this as utility.

DNC has Samba, Curing Watlz and Improvisation. It doesn't needs any other buff that would give it another edge in the ranged role when it's been the best ranged since its introduction.