Very very interesting.... I found 3 legendaries and a set legendary today alone.
I wanna see the rarity of that feat.
4 Inferno Whimsy runs
70 Dex 20 all res 15% ias 7% life Mempo of Twilight
68 Dex 65 vit 192 armor 1.02 spirit regen 7% crippling wave damage Inna's Splendor
60 Dex 126 Intel 14% extra gold 11% mf 39 life regen 3.0% crit chance Promise of Glory
87 Vit 27 all res 12% life 124 life regen 4% reduce melee dmg socket Ivory Tower
(876 armor 11% block rate)
Legendary Drops from Normal Monsters: 2
Legendary Drops from Elite Monsters: 4
Total Legendary Drops from Any Monsters: 6
4 of the 6 legendaries were found running 250-300% MF
The rest were either leveling or were from trash, with minimal MF.
I have found 3 more legendaries on top of the above mentioned. But they have been from breakables/chests (weapon rack, and clouds)
My MF gear would generally only be equipped for around 500-1000~ of the elite kills through MF gear switching. Normal mobs would be with little to no MF gear.