I can advise you to test and get a warm-up on a new server, if you have the spare time, play 1 week in a new server to get the hang of the game.
Then play on another new server with these rules in mind:

1. Don't spend any of the coupons you earn since server opening until the Lucky Board event arrives.
2. DO NOT use any seal scroll you earn since server opening, wait till level 70 and you can draw on the GNW treasure which has valuable ninjas with good value for the seal scrolls used.
3. Freeze your level at level 70, as in totally freeze. Doesn't matter if people in your home server get ahead of you, JUST FREEZE. Your goal is to be top of your sage level bracket, not the top of your server yet. You will rise above once you stay top 1 in lvl 70 sage for many months.