Idk about you, but VS and Ukko's fury are just random now with the nerf. My sam does way more overall damage than my mnk and they both have 90 empyreans.
I'd really have to doubt your mnk gear vs sam then fupa, and whether u parsed or not. Idk the nerf to ukkos by heart but smite lost 5%, which all things considered is less than 5% loss to smite, around 2% loss to overall DPS. Even with crappy rev fists +2, don't usually get out DD'd by a sam on much - a recent ig-alima spam being a noted exception.