I will duplicate here what I wrote in the comments

If I'm right, now this is only possible with a direct link to the mod, in the end my mod will have to check compatibility with each of these mods, and it's not a fact that this will work
So I won't do this, but if I remember correctly, everything should work fine with the Antisocial mod

And yes, if it were possible, I would do it, but all I could do was add compatibility with Social Slots; tModLoader has not yet advanced to another level in terms of mod autonomy

Ok, an alternative mechanic then:
could you make a mechanic where you can siphon experience from items you've already leveled and into a storage item of sorts (like say a "bottle of experience" or something fancy like that) which can then be used as currency to transfer experience onto other items?
Perhaps theres also a percentage of loss in the conversion also when doing so.