For Servants who abuse their buster oriented decks (hello all zerks aside from Vlad), Gil CE would be more useful imo. Gilgamesh, Karna, and prolly most of the 'Buster NP + 2 Buster cards' crew would also appreciate it. I find Golden Sumo to be better for Servants with mixed decks/need the starting NP gauge as a jump start. Aside from Emiya, I'd simply just slap it on anyone who I want to be dps.
LB Golden Sumo vs Partake with the King?