Good way of using 60s to boost you

[The Crowd]

its a bit different from the usual mob tagging but i agree i would be cautious with that method

Athene was using 3druids, 2 mages.
2 feral tanks, one resto Druid. Frost mage (all 60) and a boosted mage. Also frost.

step 1, both tanks stealth to pyramid.
step 2, both mount up and run back to entrance. If they get dismounted bear form to avoid the Polymorph.
step 3, gather every mob from the instance at the portal.
step 4, aoe them all down to 10-15%hp with the level 60 frost mage.
Step 5, lvl 60 mage frost nova’s and all the lvl 60’s jump through the instance.
Step 6, boosted mage does one round of blizzard, frost nova, blizzard. May need cold snap frost nova blizzard again. Whole instance dead. 2 or 3 levels per pull. Took about 15 minutes start to finish.

[Kruschpakx4]

I remember watching their world first report when they got banned at 79 xD so yeah probably they weren't then only ones using that method but they certainly had the most attention...as long as no one reports you you might be fine