I have some ideas about these two!
SlashBlade: First recipe is a wooden sword with 1 durability missing. Make a crafting recipe for a 58/59 durability wooden sword (or oredictionary something) and the recipe requires Psi or Blood Magic to be crafted. Like instead of two wood logs it'd be Psi Metal or Demon will. I've tested slashBlade in 1.12.2 extensively and it's very glitch-free in a large modpack. I've no clue why it's still in beta.

AcademyCraft: This recently ported to 1.12.2. Basically the Constraint Metal Ore would require an Osgloglas level pickaxe to mine or higher. Probably higher based on how powerful Esper abilities can be.

These would add an extra dimension to the gameplay and make a katana actually viable endgame. If you'd like I could develop the recipes and perform the testing for you. I just need your blessing to do so before I start

To be honest I don't think there's a need for either of those mods at all.
But thank you for your suggestion.

I just thought it'd add more ways to 'weaponize' the player is all. Like if you die when you respawn you still have built in esper abilities to help get back to your death spot. And with slashblade was hoping to get a katana worth using unlike the one from plusTiC which is basically useless in most situations compared to a scythe or a rapier.

Edit: Worth noting is I'd make the modifications and leave it at that if it were just me, but I run a server and wanted to share the experience of having these mods knitted into the mix and my friends won't download anything that isn't on the twitch launcher

Ah fair enough, but I'm afraid it's a no :(