I dont think going to a new server would help. My server is a little messed up with the amount of high power people. S59/61/63 has 14 people above 100k and has Kahpow (2nd most powerful). We have 4 groups that can participate in GNW and its usually ANBU Elite (with Kahpow) that goes to X-GNW, but another one sometimes can beat them.

Of the top 25 people in terms of power on our servers, only 2 of them are in neither of those groups that can go to X-GNW. Our group has been asked multiple times to merge with one of the two groups. Honestly, in this game the people with the most power band together because its better for them too