Go do AK and save up for DL first, whilst in AK you will also get Myth tomes, save those for later. Once you capped 300 myth for the week start farming CM for Philo Tomes for DL gear. Once you have about half full DL gear you can attempt to complete the relic quest, once you complete relic quest, hopefully you should have saved enough for 900 Myth tomes to get relic +1, if not keep farming AK for it. Once you have relic+1 you should also have full or almost full DL gear, you then attempt BC and farm AK for myth tomes for AF2.

DL --> Relic --> Relic+1 --> AF2