You should enjoy not having cross server events meanwhile. I mean sometimes in the same server having a rival or just healthy competition is okay. I've been playing this game for 3 years and tbh, the best thing you can do is just enjoy it when it's not cross server, if not you can get kicked by a guy who doubles or triples your power. You can get there even so, just save your coupons and do a fukurukumaru or konoha tree to get more rewards and power up. Cross server events aren't that important to get rewards, meanwhile try to get to Sage of the 6p in arena and manage wisely your power :3

Dattebayo!