If leveling armorer is your idea of masochism, I suggest you stray away from all other crafts. It is by far the easiest craft to obtain a 50 in (although some might argue alchemy is easier, but I would say it is harder 42+).

Iron squares are ridiculously easy and cheap to create in bulk, and will take you all the way to 50. If you have leatherworking in the low 20's you can make your own buffalo leather straps, which are also extremely easy to make in bulk, or cheap to buy, especially now that they are being phased out and the price of buffalo leather has tanked.