It doesn't take all that long to get a tribe maxed out. What is it? A month? There's currently 18 allied societies. Likely 20 by the end of DT. You can do 2 tribes/month to max. So that's 10 months of dailies. And the rewards for that last 10 days of each tribe is to get to Bloodsworn - which if you do all societies for that expansion, you get, usually, an emote. If all you cared about were the rewards/story, it would be 20 days per society. That's about 6.5 months.

If I was a new player, I'd start from DT and work backwards.