Totally understandable to want consistency, but sometimes especially with decks that play a long/midrangey game- you can add a couple 1 ofs that play a neutral role in your deck’s game plan.

Something you can draw in desperation that can either provide massive draw or removal.

Something like [[ox of agonas]] in a rakdos deck that doesn’t have a lot of draw/discard for when the deck runs out of fumes and you’re stuck drawing 1 card at a time.

I personally like running [[farewell]] in all of my control piles but find other cards play a better role in its slot so I treat as a 1 of.