I know all of the runeforges (such as Stoneskin and Swordshattering) operate on flat percentages that do more/less to a stat based on your level, which IS influenced by some of the crazy 409 gear that 80s can use. However, due to them being low-leveled, the absurd numbers that Mists weapon enchants provide (Windsong is the one that really comes to mind) can scale to absolutely ridiculous percentages for Crit, Mastery, Haste, and Strength if you're using Dancing Steel.
Has anyone experimented on an 80 Twink or run any numbers to see if the procs would be more beneficial as opposed to the flat boosts provided by Runeforges?