The best way, GNB 70

[Warlyx]

It depends on whether or not they are buffing the EXP of the Alliance Raid and Main Scenario Roulette for the levels 60-69. I think doing both of them already gives you at least one level, so just using your roulette should be enough.

And I think that we will see too many GNB after the first days. Most people simply don't like to tank.

yeah alliance roulette at 60 is instant 61