What's the easiest 2-man team to level?

[Groschen]

Regarding the "pun":
I wanted to riff of the phrase "let them do the talking". Well, I guess there's not much talking in WoW, so my bad.

Progress Report:
Wanted to let you know how my team's doing:
It took me /played 3 days 10h for them to go from 1-81 with questing only.

Here is the cast sequence / macro I used most of the time. (Also known as the I-win button. )

/assist NameOfMaster
/petattack
/castsequence reset=combat/target Hunter's Mark, Concussive Shot, Arcane Shot, Kill Command, Steady Shot, Arcane Shot, Kill Command

It wasn't hard to do, just took me a while (see above).
Fun Facts: I only did one complete (i.e. with Achievement) zone in Outlands (Hellfire Peninsula from 58-65)
Same in Northrend where I spent the most time in Grizzly Hills.
RAF goes all the way 'til you ding 81. It's really painful going from almost 100k exp to around 30k per quest.
I'll need some time now to stomach that drop and keep on leveling.