Grandmaster Leatherworking: 351 - 450
In this final leg, It's time for Borean Leather, and LOTS of it, mind you.
351 - 380: Convert Borean Leather into Borean Armor Kit. These kits will sell very well on the AH, so you can make some decent profit out of it.
381 - 385: Make 5 Arctic Boots.
386 - 390: You need 5 of Iceborne Shoulderpads here.
391 - 405: Go make yourself a cup of coffee and some sandwiches here for this part. Make around 250+ Heavy Borean Leather. Should easily get you to 405 where it turns gray.
406 - 415: From here on you would be making blue items so the cost of mats is going to skyrocket. 11 - 13 Dark Frostscale Leggings.
416 - 420: 5 x Pack of Endless Pockets. A neat 32 slot Inscription Bag that will make some good money on the AH.
421 - 425: Make 5 Overcast Bracers. This NPC sells the recipe for this item. He also happens to sell most of the epic patterns in Wrath of the Lich King. Each of them costing either Heavy Borean Leather or Arctic Fur.
426 - 435: Now you need Overcast Handwraps to get to 435 - Will probably need to make around 13 to get there.
436 - 440: 2 of these options.
Frosthide Leg Armor - 2 Arctic Fur, 2 Nerubian Chitin, 1 Frozen Orb
Icescale Leg Armor - 2 Arctic Fur, 2 Icy Dragonscale, 1 Frozen Orb
441 - 450: These last 10 points would mostly go slow. Best thing to do here is to take it slow and make the different types of epic recipes that are available 1 by 1. Or you can continue to make the Leg Armor patches you made previously. You would be making most of the money back anyway by selling them.
Congratulations on cracking to 450 with Leatherworking!!!. Hope you liked this guide and it helped you in your journey to 450. Adios!!