Ravelli.. Rare items fall under the same category as their normal counter part and can be used in any kind of crafting taht use their normal counter part. You don't -need- new recipes.
I got
Strength 79/79
Fortitude 75/75
Agility 80/80
Dexterity 30/30
Intelligence 80/80
Perception 75/75
Charm 10/10
Spirit 70/70
46 Scavenge.
I'm not finding a lot of rares (but I haven't ventured that much away from my safe area) I can say that I'm still getting the same amount of scavenged stuff per interval as usual. It's just different items I scavenge now.