I will agree with some of the above. Out of all my runs I've ever done in feast, Lufus has never dropped a pink anyone I've seen and I've never seen Vlod drop a dragon on anyone, just junk pinks. I do still kill Lufus and Vlod just because I'm kind of a completionist and I feel like any day now they will each give me a dragon because they "owe" (statistically) me after killing them so many times.