So my past 3 bonus rolls were for some of what I thought were garbage mythic pieces. The off-hand off of Oregorger, the bracers off of Darmac, and the ring off of Darmac. I was replacing Heroic Maidens bracers mastery/ms, Thogar off hand Haste/MS, and mythic Tectus ring Haste/MS.
Now, the bracers and ring had what I thought were the worst stat combinations possible. Crit/Vers. And the offhand worse than that with mastery/versatility. So I decided to sim. Turns out the 3 mythic pieces were around 1000 dps upgrade. I think nowadays we're so trained to only look at secondary stats on gear. And if it doesn't have your best secondary on it, we look at it like it's garbage. I see people constantly turn down 15 ilvl upgrades because they don't have their best secondary on it. But what we forget is int is twice as strong as our best secondary. And it's so easy to overlook that.
And another thing I found out in my sims, Versatility sim'd higher than mastery in all cases.