I would like to suggest a crafting of 3 of the same armor or weapon of the same level and type to make one of the next level.

I have doubles of certain items and want a higher level of them but have to throw them away because there is no way to combine them to make better.

3 of the same kind would cost more but it would also make it so items don't have to be thrown away that a lot of time and effort went into making.

this is a thought i hope you will consider.