http://i.imgur.com/vVyEZj1.jpg – example fight against Mill Druid.

Very good counter for Mill Druid and lets you to do your daily with druid aswell :

—- (1) Innervate

—- (2) Druid of the saber (stack as many stealthed ones as you can and then buff them with Mark or if your opponent destroy your cats – use charge option with buff or without)

—– (3) Mark of Y’shaarj (i hope i dont need to explain here how do it gonna work with your Druids – just buff them – get another Druid/mark/innervate and repeat)

Good luck!