First and foremost finish the 2.0 main scenario. Start your relic, its relatively painless to get it to iL90. If you can take the grind from that point it will become the best weapon you can equip.

Anytime you see a L 50 quest grab it. They are almost all dungeon unlocks, not all are in Mor Dhona, not all are gated behind finishing the 2.0 main scenario. And they all drop gear that is higher than iL50.

The Legacy of Allag quest line is gated and it is the best place to up your iLevel. It is in St. Conach's Find. Until then crafted iL70 stuff is probably your best bet.