It is possible to make this quest with maker (I'd say 80 mage is minimum and pretty hardcore, 150 is reasonable,other vocs around 150 too, but with that low I'd suggest rest of the team at least 200+), however you need team of 5 ppl for minibosses and 10 for final,
I did this quest few times and I can tell you that it's pretty easy one, but it might be hard to assemble a team because most bosses (except Ab'Dendriel and Outlaw Camp) doesn't drop anything good, so people are barely not killing it.
Some tips:
Ab'Dendriel boss is easier to kill when whole team spam mas res/UH runes on boss while standing next to barrel, and attack it, so pink elemental will spawn and make whole process faster.
Orc boss has probably the hightest dmg so be careful here.
Best strategy at Carlin is killing all pillars then attacking all minibosses together, at final form RP does great job.
Mino/Outlaw/Sandking are pretty weak ones, it's even possible to solo/duo them with lvl around 500/600, so if u have some highter lvl friends ask them for help.
Final boss is also easy but has pretty unpopular mechanics, so before going there watch any youtube video and split your team,then pull the lever.