You can use TellMe to get the following enchantment dump:
https://gist.github.com/Vyraal1/51b6319226667f35689fb3ad5eed2682

There is redundant Soulbound effects from EIO and CoFHCore. As well as redundant effects of Smelting and Autosmelt. My recommendation is to remove the CoFHCore one as the EIO variant is just strictly better.

You could also argue there is redundant XP Boost / Insight (but as far as I know they stack instead of being mutually exclusive). Secondly there is also Leech/Life Steal, but they also stack and could make for very powerful weapons.

Would also recommend disabling shimmer if possible, as long as there isn't any world breaking ID shifts.

I would recommend actually removing the EIO smelting enchant, and maybe the xp boost as well. They both apply themselves to pretty much everything, including things that can't actually use them like TE baubles. Probably something to mention in the Ender Core github as well. And maybe Repellent as well, as that can cause strange things to happen.

Vote to keep COFH smelting since it synergises with smashing.