- Frequent Diplomacy games
Your best bet is CORP.
- Active community
Communities are often different between clans; activity doesn't always make it's forums or games fun. Anyway, any of the listed clans have it.
- Welcoming forum
The Juggernauts have the best one here.
- Lively clan (eg. Not the Falcons)
Again, liveliness works different between clans. All the ones listed have it to some extent.
- Establsihed leadership
The only clans with unstable leadership at this point are roughly the Falcons and World League. Some others have some potential trouble in the horizon, but nothing that can't be avoided.
I'll save this pic; been more useful than I'd expect. Some mistakes here and there, but good enough:
Essentially go to one of the top ones or EIC for what you are currently looking for.
Edited 6/10/2016 15:45:20