At the moment, clans have no real purpose on Olympus. So I have suggested challenges for clans so everybody can compete for a reward at the end of the season.
TOP REBIRTHS- The clan with the most total rebirths would win a reward at the end of the season.
TOP MINING- The clan with the most blocked mined would win a reward at the end of the season.
TOP MANA- The clan with the most Mana ( Basically who ever is the richest clan) would win a reward at the end of the season.
All the stats of all 3 challenges would add up in there own stat section in the clan bio. The would need to be custom leader-boards for this and a new and self made clan system.
More info is in the link I provided in the top. I had limited characters so this was the shortest i could put it. This idea gives clans a purpose, brings in more competitive activities, and could potentially boost activity on Olympus.