Boneshatter Waistguard

To level up runecarver chest these are the materials u need, to reach rank 4(which is max rank in 9.0.5) :

To reach rank 2

5 x Enchanted Heavy Callous Hide (to create Enchanted Heavy Callous Hide u need 2 x Heavy Callous Hide and 1 x Soul Dust ),
5 x Heavy Callous Hide ,
15 x Heavy Desolate Leather (u also can create them by using 10 x Desolate Leather ) ,
20 Pallid Bone
12 Orboreal Shard (the price of Orboreal Shard depends on Your reputation, at exalted reputation 1 Orboreal Shard costs 100 g at vendor)

You need to craft 15 items to reach rank 2 !

Overall mats needed for to reach rank 2

75 x Enchanted Heavy Callous Hide ( which is 150 x Heavy Callous Hide )
75 x Heavy Callous Hide
225 x Heavy Desolate Leather
300 x Pallid Bone
180 x Orboreal Shard

To reach rank 3

8 x Enchanted Heavy Callous Hide (to create Enchanted Heavy Callous Hide u need 2 x Heavy Callous Hide and 1 x Soul Dust ),
8 x Heavy Callous Hide ,
20 x Heavy Desolate Leather (u also can create them by using 10 x Desolate Leather ) ,
30 Pallid Bone
18 Orboreal Shard (the price of Orboreal Shard depends on Your reputation, at exalted reputation 1 Orboreal Shard costs 100 g at vendor)

You need to craft 15 items to reach rank 3 !

Overall mats needed for to reach rank 3

120 x Enchanted Heavy Callous Hide ( which is 240 x Heavy Callous Hide )
120 x Heavy Callous Hide
300 x Heavy Desolate Leather
450 x Pallid Bone
270 x Orboreal Shard

To reach rank 4

12 x Enchanted Heavy Callous Hide (to create Enchanted Heavy Callous Hide u need 2 x Heavy Callous Hide and 1 x Soul Dust ),
12 x Heavy Callous Hide ,
30 x Heavy Desolate Leather (u also can create them by using 10 x Desolate Leather ) ,
50 Pallid Bone
30 Orboreal Shard (the price of Orboreal Shard depends on Your reputation, at exalted reputation 1 Orboreal Shard costs 100 g at vendor)

You need to craft 15 items to reach rank 4 !

Overall mats needed for to reach rank 4

180 x Enchanted Heavy Callous Hide ( which is 360 x Heavy Callous Hide )
180 x Heavy Callous Hide
450 x Heavy Desolate Leather
750 x Pallid Bone
450 x Orboreal Shard

Overall materials needed to reach rank 4 are

375 x Enchanted Heavy Callous Hide ( which is 750 x Heavy Callous Hide )
375 x Heavy Callous Hide
975 x Heavy Desolate Leather
1500 x Pallid Bone
900 x Orboreal Shard (900 x 100 = 90 000 gold at exalted rep)

This is the most expensive craftable item ever ! If u thinking of buying everything on AH the material costs will scale from 1,5 mil to 2 mil golds to buy all at this time !

Also gathering Heavy Callous Hide is real pain and will take up to 30 h to farm(if not more), because only every 18ish skinned mob will drop 1 x Heavy Callous Hide in patch 9.0.5 (there was a nerf on Heavy Callous Hide in previous patch, before that, every 8ish skinned mob dropped 1 x Heavy Callous Hide ) Happy farming !