Just my opinion but imho top3 people in sage world battlefield should just gain seal scrolls and summoning scrols while are the other people that should get the advanced refinement runes.
The idea should be that top people get more ninjas and other people get the chance to catch up with them.

About this 60k power guy you talk about... in my bracket we have an 80k power guy that stayed 88 for weeks to get rewards and that now is 89 because couldn't avoid it. And he runs earth main naruto six tails gaara kk bee sst lineup.