Ok the absolute WIERDEST group I've ever been in was:

Karnor's Castle:

Bard (me)
Necro
Druid
Warrior
Paladin
Monk

We absolutely RULED the zone. We went all the way in and were having the
time of our lives. None of us could believe how well we were doing without
a cleric but, point of fact, we just didn't need one. With the Druid
hitting everyone with pack regen and me using lute songs with Hymn up we
were barely getting hurt in most fights and the few times we did get hurt
the paladin and druid were more than able to keep up with the dmg we were
taking.

When the necro split we picked up a Wizzy and kept right on going. Downtime
was minimal, if any, both Druid and Wizzy were nuking for the most part and
I handled any crowd control needed.

Fun fun fun!

Another group I never thought would make it was:

Paladin
Ranger
Rogue
Rogue
Bard
Shaman

We absolutely destroyed anything that got near us. Ranger and I split
pulling duties.