Hell just with AK as an example they could do the Big dudes with swords drop 1 tome, while other mobs drop the bronze pieces or something.

They could make it so chests give everyone 5 philosophy tomes. And silver instead of bronze. They could make 2 of the chests drop jewelery just for a little extra incentive.

Bosses could straight drop more tomes of philosophy so instead of 80 a run you get 120 making it only take 43 runs of the duty. They could make the primals drop more too. Though all 3 primals are a harder fight than final boss they drop 1/5 of his tokens.

I am sure there are more options we can come up with to fix this content grind. If any of you developers need help just shoot us some PM's for suggestions we can totally help with ideas.