Another thought on this...
Have tribes who have more XP or levels be able to get more groups. ie. If your tribe is L1-10 you can have ONE group. L10-20: TWO-FOUR groups... or some such thing. This way folks have to work to earn the tool sets.
Another thought on this...
Have tribes who have more XP or levels be able to get more groups. ie. If your tribe is L1-10 you can have ONE group. L10-20: TWO-FOUR groups... or some such thing. This way folks have to work to earn the tool sets.