Just look at Winged Words
First Degree Burns I believe that the red decks in Pioneer want at least twelve one-drops , with the more aggressive builds wanting even more
Mono-black go-wide decks tend to also be aristocrats (Marrow-Gnawer, Shirei, Shizo's Caretaker) making needing to sacrifice a creature hardly a cost at all
On the other hand, Winter Orb, Chaos Orb, Ankh of Mishra, and Nevinyrrals Disk are all a bit undervaluedthey show up in almost every cube
This should always be in the hands of the people, enjoying this hobby for what it is: a fun game where it doesnt matter if you win or lose, giving importance to the most important thing: the gathering, even if that sometimes means putting up with the terrible snoring of your roommate just before the tournament