Original Manifest usually gives less control, although older cards like Scroll of Fate and Whisperwood Elemental are still strong in the right deck
You cant respond to the act of ending a turn, but you can respond to the spell or ability on the stack that has that effect
Control and midrange decks appreciate how it thins the deck slightly while guaranteeing future land drops, and Commander players like having a low-opportunity-cost way to fetch whatever basic theyre missing
Since it targets a player and not a permanent itself, you don't have complete control over which enchantment gets sacrificed, though you're obviously aiming for someone who only controls one enchantment anyway
I also highly recommend keeping the mana value of the deck as low as possible, to maximize the chances that we can actually cast the cards exiled with Inti since we only have access to them for a turn
However, gaining access to the Monarch mechanic and both Black and Red cards positions her as a force to be reckoned with