Normally best rate of return comes from fuku paired with events like Great plates or konoha great tree. Events that provide rewards after so many pulls and points/power items with each pull in general are most beneficial. Try to avoid the rng events!!! Lvl freezing may help out on a new server for a while. From what I have read on forums... Some new servers don't have access to sage world since there are too few players to participate. Really limits the benefits of level freezing until it becomes a cross server sage. Would suggest lvl freezing after lvl 70 so you gain access to all treasures.

Supposed to be around 60 days from server start but have seen posts of servers where it took longer than that.

I can't say for sure. It may have been 30 days in the past but with them opening new servers all the time... the workload of managing server merges and such may have delayed this process. Could also be them just not managing the game properly anymore. Personally, I believe the game has a pretty bleak outlook at this point so would honestly say spending your time elsewhere may be more beneficial to you. Reasons being: bugs not being fixed in a timely manner, they have not addressed how this game will function without the flash player operating system, had the "new version" release a while back and all the functions associated with it have still not been implemented, their rush in releasing ninjas in order to "milk" the whales, mobile naruto (this might be where the game is going..), and a few other factors. This is just my opinion so take it or leave it as you wish. The strategy aspect and story up to about lvl 90 is pretty decent though.

Happy gaming and I hope you have a wonderful holiday season!