Zadnor - Weekly Challenge logs would have made the grind a bit more bearable

[Vahlnir]

Problem with after you reach max rank, proofs of mettle cost a whopping 20 million for 3 of them.

In context: That's 7 runs of The Delabria (7 hours or so) or 77 skirmishes in the rank 3 zone (at 261,000 mettle a skirmish) however long that would take you.

For 3 ranks of mettle. It has been estimated that it might take upwards of 600 million mettle to max everything out.

Between skirmishes, Dalriada and CEs it doesn't take as long as you claim per turn in. I would try doing more than one activity at once and educate yourself better as to how things work.