With access to an SG and a base crystal you can make it to 50. Throw in SBB from 15 on, Seed of Hamidon take down, plus the fact FW/NW are coop zones so you can join teams ( bit of waiting until everyone is there because it'll register as a mixed group) and you can keep going. Then you can do any iTrial provided it starts in Pocket D or Praetoria, and CoP. What else? You can join the Emperor's Sword mission from Vetrano, just not get it yourself (the reason why not is ridiculous) and do Cole's Personal Story, which you can get yourself, because these start in NW ie Praetoria.