If your only ways to win are a couple of top end blue monsters then you can't really include all of them in your total options
The tap mode is certainly the most situational, but when its good, its really good
Cori-Steel Cutter Monstrous Rage Stock Up Between Izzet Prowess, Izzet Proft, and Jund Midrange, a combined 43% of the field is using Cori-Steel Cutter
Tribute itself is not a triggered ability, so cards like Panharmonicon or Elesh Norn, Mother of Machines that double triggers dont copy tribute
Conjurers Closet and Thassa, Deep-Dwelling will be some of the easiest ways to guarantee Lavinia keeps cheap permanents on lockdown, but having a suite of blink spells to back them up is never going to be a bad thing especially since it wont take long for Lavinia to become a priority removal target for the rest of the table
What reprints make these decks worth getting