The major wads, in order from easiest to hardest.

[Danfun64]

Of all of the major wads, I'm curious to the general consensus of how easy and hard they are. It would make organizing coop a little easier if you know the difficulty of what you play.

Chex Quest 1 (includes Official CQ3 and TUCQ varients)
Chex Quest Advanced
Chex Quest 2 (includes Official CQ3 and TUCQ varients)
Chex Quest 3 (Official, mind you)
Chex Quest Journey of Legends
Chex Quest The Lost Quest
The New Chex Quest : Generation 2
Community Quest
Chex Quest Skulltag Pack coop levels (E1M6-E1M8, E4, E5, COOP01)
Strife's Levelpacks (requires TUCQ)

That should cover all of them. Newmaps isn't included because you can't run coop on it it seems.

[MajorSlime]

The Lost Quest is by far the hardest (no offense arch )

[75]

My vote goes for CQ Gen 2 (the slimeinator), Chex Pack E4, or Ragnarok.... maybe E1M8

Those old co-op levels of mine (E5, COOP01, E1M8, etc...) aren't really that great

[Danfun64]

I think I might not have made my point clear. I didn't put the wad choices in any particular order. I was hoping that somebody would arrange them in the easy to hard order that I mentioned, as I don't know which levels are harder than others.

[LAZ Trooper]

The Lost Quest is by far the hardest (no offense arch )

TLQ harder than anything made by The Slimeinator? o_0

[MajorSlime]

Hmm. I would say, at specific points yes. But you do make a point.