As it currently stands, Ceremonial Dagger is a bit of a meme. It's a very awkward design that has a lot of negative synergies and very few positive ones.
My suggestion is - when Ceremonial Dagger "eats" a Joker, that Joker disappears from that game. You can no longer get it in shops or packs. This makes it easier to hit the Jokers you really care about.
It also fits the fantasy of a "Ceremonial Dagger" doing unholy and possibly demonic things to Jokers, such as removing them completely.
It's not even that broken - at best you can eat maybe ~20ish Jokers, all while keeping one Joker slot constantly empty. But it'd give it a lot of early-game utility.
, if you self-upvote you should also downvote