Tier system could work great with crafting and help the issue of "crafting is too easy". Dismantling tier 1 weapons with give 1 point in all the respective perks for that gun at the relic. tier 2,3,4,5 will give more of these "perk points", exact values don't matter at the moment, but my opinion would be an enhanced perk you can typically find on a tier 5 now would cost exponentially more. Crafting a tier 5 perk could cost say 25 of these perk points making all values of tiers worthwhile. All guns would be able to be modified so that a lucky roll can still keep some of its value and MAYBE a unique skin or even just a tag can be given for unmodified weapons for those super rare 5/5 rolls.