To my knowledge right now (and sorry if it's actually already in the mod and I'm just blind) the mod only has an option to removeAnvilLevelLimit, and you can specify the max level of enchant for everything(?) with newAnvilLevelLimit.

It would be nice though, to be able to specify the max level for each level that you want using the config file.

Perhaps something like:

# If first argument is just a number, then it acts same as "newAnvilLevelLimit"
# Otherwise default limits are kept bar for enchants mentioned after.
anvilLevelLimit: efficiency:8, unbreaking:8, protection:6

Hopefully it wouldn't be too complicated to add, but it would be a really nice addition to this mod!

This would be too complicated for me to add for sure, but if someone was to pull request it I'd accept it.

Sticking by that and closing the issue, anyone can feel free to pr it.

Unfortunate this won't be added, would've been a nice feature to have now that the limitless mod is now completely non-existent for whatever reason.