lvl boost in hinterlands need advice

i met a multiboxer on my server who told me about it was possible to power lvl 1 char by going to hinterlands.. have him tag everything then kill the mobs with the rest of ur accounts from another grp...
penalty in level difference ofc happen but they are so high lvl and its elites so it should be worth it ... he talked about doing it already from lvl 10
i kinda balls deeped it with a lvl 6 tried tagging stuff but aint getting any exp it seems is that because i chain fear with a lock first so the lvl 6 can actually tag it?

it is basicly what asmongold does in this video https://www.youtube.com/watch?v=MuTshid9m6E but from an earlier level.. the dude said u could get 60 in 1-3 days played im not sure if im doing something wrong because it aint working for me at least

skulls wont give you xp and anything under level 47 for a 60 boosting u will give you significant xp reduction. The only way to boost from a level 60 openworld to a low level like yourself you would need to use lvl 60 pets such as warlock or hunter pets and having someone dead in the graveyard for whatever reason gives you full xp. If you don't want to do this you should boost in dungeons with 1 60 and 4 lower lvls to get the most xp.

AFAIK Blizzard patched the Hinterlands thingy (lowbie tagging, high level out of group killing) as Asmon was doing it once; did not test it though.

Just do normal boosting; put 4 toons + 1 high into a group and then run through the level appropriate instances.
Like 1 run in Deadmines with 4x 20 + 1 60 is about 40% XP on clear... in maybe 10 minutes.