Dual Box Group Help

Hi,
I am pretty new to boxing and i want to start out duo boxing, i have tried shaman and find it too easy and a bit boring,
I was thinking about trying a melee and a caster/ranged together and was wondering what the best compositions using this setup were, i am also looking for something of a challenge something which isn't too easy, yet not incredibly hard for a beginner.
Thanks, English.

PS: Sorry for bad english.

try paladin with mage or lock. Other good team is two Druids

Paladin Tank + Hunter. Hands down the easiest duo of Melee/Range I've tried.

Why?

Because they both use instant abilities with very similar Cooldowns. No castsequence needed, just pair off the matching CD's to the same keybinds.