Im not sure what the overpowered enchants were, but I think some enchants that are rarer and harder to get would be fun. Included throwing in chances to get bad enchants such as slowness II, Or add in silly ones like jump boost X that makes you die on impact (for the thrills and giggles) Maybe also adding in higher teir enchants such as Unbreaking 6, but that could effect the economy drastical. Well thats my stuff =3