Similarly to Censor, a good amount of the strength of Cast Out is the ability to cycle it away for only one mana
I daresay they pushed it pretty hard, since it quickly made a huge impact on Legacy and eventually led to the banning of White Plume Adventurer
Residential proxies are the gold standard here because they're tied to real ISP addresses, making them far harder to flag than datacenter proxies
Two-mana is a hefty sum to spend tapping down a fatty but you'll gladly pay it if the need arises
Destroying a creature and an artifact at the same time is pretty brutal, for sure
Other than Heihei, Protective Rooster and Sleepy, Sluggish Knight, you're going to want to go for speed and try and win before your opponent mounts a comeback