preferably a group of 3 or 4.
I want to rush through the campaign on heroic and complete all achievements along the way.
If possible only players from europe. I don’t want to have a bad connection while playing 
Fancy doing it on Legendary? With a full team, it shouldn’t be difficult at all.
I’ve already beaten Heroic solo, and earned most of the campaign-related achievements, so I’m all for helping other people get them during co-op games*.
*Obvious one - distracting/EMPing the Wraiths in Mission 5 so someone else can get the pesky ‘Mortardom’ achievement. That one’s tough…
Best part of beating Legendary: you get the classic Mark VI suit for War Games/Spartan Ops. WELL worth having, AFAIK!
I’m in the UK, and can get on to play pretty late (often until 5am GMT), so that should be ok for avoiding connection issues. GT is Richard 060.