Have a question

Ok i think i finally have figured out for the most part, which mods and inscriptions are worth salvaging. Most have to have health +30 or higher, nothing lower than 20%. Now for + armor i'm unsure of what that should be and if there is anything else i should be looking at?

+armor as in inscriptions for shields? +10 vs fire/lightning/piercing/slashing should be relatively easy to sell.
If you mean the weapon mods like pommel of defense and stuff, I wouldnt really salvage them. You could salvage one of each weapon type and store, you never know when you need them. Trading them isnt really worth it imo.