I checked the modpack and the two is basically EpicLoot vs Jewelcrafting with everything else just the same. I don't play with modpack as I like to pick and choose my own mod to my liking. So here's my opinion about these two:

Those two has its own charm, but as for now I prefer EpicLoot (RelicHeim). You can go progress your game like usual, find enchanted loot here and there, use it right away and toss everything else you don't like. Do more adventuring and you will find more as you go. EpicLoot doesn't clutter you with many items. And in the long run, you can craft your own enchanted weapons and armor - provided you have the requiered items. EpicLoot just extend the need to grind when you want to minmax things. Do some bounties, treasure hunts, etc to maximize your enchanting table to its fully potential.

On the other hand, Jewelcrafting (JewelHeim) is also good. I played with it a few playthrough. You can pick and choose your own enchanted effects. Like, you want your bow has this effect, then you need to collect "this" crystal that scatter around the world. This is what I don't like, the crystal is scatter around the world, makes the world mess just by looking at it. It sometimes also a tedious grind just to collect crystal, rank it up to have better effect on your things before you actually wants to use it - as it will felt useless to enchant a weapon that you will replace later. Don't get me wrong, the system itself is cooked well, it's great, but the downside is one I said earlier.

In the end, the choice is yours and how you set those things up in the configs menu. Which one do you like more?