My suggestion is to lower the requirement to get rewards accordingly to our rank from "sage of six paths" to "kage" rank.
it's something hard to get too but at least in two-three months is somehow reachable by everybody if they got a good team and they play a lot (and they still want to reach the higher ranks for the season rewards and the una tantum ones).
Sage of six paths is in no way reachable before 5-6 months of hard play if you didn't reach it when your server wasn't in the cross server circuit and if you don't pay billions.