I've done the Northrend Rhino (Borean) Grind.
You need at least two toons in the party, to get the experience.
It has to be a party.
I did it with two toons.
An AoE type is preferable, for gathering mobs.
You need pet classes, shammies (totems are pets) are the best.
Have Stoneclaw on round-robin, the stun component rocks.
Gather a bunch, with lowbie AoE (Arcane Explosion rocks for this).
Then drop a Stoneclaw and 3x Magma, refreshing Stoneclaw as it is killed.
I got 5g per stack of 5 Rhino Meat, it is the Dalaran Cooking quest quite often.
It took 4 months to sell it all off, keeping 10-12 stacks of five on the AH daily.
I stopped looting, around level 65 or so, and had 250 stacks at that point.
Passing on the loot, will dramatically speed the process up.
But then again, even if the profit is over time, that was 5k gold in under 5 hrs farming.
If you are interested in leveling a team...
Not sure if this is a good method.
Two stoneclaws on round-robin, likely would not be enough, unless your pulls were a lot smaller then mine.
Also 2x Magma's would take longer to kill things, and experience would go three ways requiring more time.
You could try to boost three toons on run 1, and two toons on run 2, for a full group of five toons boosted.
Or if you're only boosting four toons, two at a time is definitely possible but boring as hell.
That is akin to 4+booster.
I did 12 hours, 60th to 70th; full rested at 60th lasted half an hour.
Not looting the first 5 hours would speed things up, but two runs will slow things down.