Just did this task with war/rog/zerk/druid/cleric/sham group. Since I was playing 5 of the accounts on 2 comps, it actually took me until the 6th mob reached Murdunk's area before I started to actually grab the runners. The setup I used was higher end group geared zerker/rogue running the helper macros and cleric chealing from 90% and druid spots if my tank dropped below 50%. Shammy threw a couple dots here and there but mainly just slows. We beat the event with 8 total going past even with 6 going past before we started.
Tank is mainly solteris geared with ac augs and a few SoD group loots and 3 last bloods and buffs to around 38k/4.9k. Rogue has the CoD group weapons with the crystallos damage augs and zerker has the Rathe Council 2hb from Glutch the Heap with the 7 damage aug from Bloodfields/CoD zonewide drop. Cleric and druid were on drogs and never saw below 90 mana the entire time.
If I had any suggestions for boxers trying this, set a warp loc key to camp and get your group there either by warping to the one toon or all warping to a camp loc. Also, if you need to med up, try to clear 8 mobs or so and then let 2 past so you can get some fast med time in.