Similar to the degree of work required in login chances and these login chants are Irvin leg WoTLK Gold armor, which gives you the strength to battle your way to 28 stamina. Then there's your frost hide leg protection that grants 55 stamina, 22 agility, and lastly, Ice scale leg armor which has 75 attack power and 22 crit percentage in the main material , outside of the frozen orbit. These require Arctic fur, and are rarely skinned from higher level mobs. So make sure you have the ability to skin to make as much money from these items as you can.
There is only one other factor worth mentioning which will play a role in, the realm of drums, and that is. Drums have changed considerably from TBC to RAF because you now have drums at a wild and Drums of Kings that are just lesser versions of buff, that you typically get from a druid Paladin.
They will soon be available for sale because people will soon see the value of bringing them to a raid, particularly 10 Man raids in which they could be missing one of these buffs don't expect massive gold from these it's just another little possibility of gold in working with leather. It's not going to be a huge gain, but you'll sell plenty of them. Of course you can still create ammo pouches, quivers, and even mining bags but I doubt that any of them will be creating regular amounts of gold like leg armor items.
Well your crafting probably doesn't require much explanation. You'll be prospecting for saronite and just making the gems that are the most sought-after. I'm struggling to tell you much more rarely, you will be able to buy WoTLK Classic Gold make rings in both blues and epics that people are likely to buy as alts or as quick upgrades to their mains.