Spent around 30 hours of farming, 400k, and only managed to get 6-7 noticeable pinks (trollbane, wyrmbrone etc). This excludes founders though, I managed to get a full set from that. It took forever though, and I FULLY regret doing it.

Sadly, in the future I will be regretting not getting 100 sets of founders, because I promise you they will be rocketing in price.