User blog comment:LegitMuch/Survival 303 for Dummies/@comment-24108228-20160208194303

Personally, I feel all tribes are invulnerable assuming you have good communication and leadership. Raiders can be quickly identified and swarmed, using longbows and stone spears if that's all you have available, and if everyone has a job and sticks to it (like you mentioned), food and water can be made manageable fairly quickly.

This is why my main two tips would be; have all members pass a competence test before they enter (cooks have to show you a pie, chemists a herbal remedy/poison, architects must be able to make a well, and so forth), and periodically say "Respond to this or I'll kick you from the tribe" in tribe chat to filter out the unresponsive players, possibly on a two/three strike system. The worst thing in my opinion that can happen to a tribe is if every member is out adventuring to increase their stats/gear up, while in reality at least one of the tribe already has the skills they need and the tools they're mining for.