I was just looking at DW leatherworking and comparing it to TWW leatherworking. One thing I noticed was that the “starter” gear you can make is always bracers, boots … and chest?
Heirlooms cover all the main categories, so in theory, making gear for the non heirloom slots first would be the logical choice for someone who is levelling and needs to replace gear they might not have acquired during levelling.
Or you could, you know, make heirlooms for gloves, belt, bracers and boots?