The Crystal Keeper Maps are quite a bit easier now. X is free as you've pointed out but G is not only possible without the Nanaly, Uzume full AW dream team, it's almost easy. Almost any AW archer paired with AW Spica and Prince buff can oneshot G eyeballs. I didn't do the math for minimum levels but my AW70 Spica is oneshotting on G, where with 20% pre buff an AW99 wouldn't oneshot. The last rush is still difficult but if you have Zola and can AW Marie or Viera it's very doable.