Brimstone salvage rate :

100% from iLv 60~63 Legendary, Sets
0.1% from iLv60~63 Rare
0.8% from iLv60~63 Blue

Sources: Battle.net

Bliz didnt neft salvage rate.

current rate in GAH - 1 Brinestone ~ 170-190K

Cheaper source :

Buy any i60-63 Legendary from AH less than 150K and salvage it.

* Note:
According my experience, current Legendary Recipe DO NOT Worth Crafting.

WHY?

1. Expensive
2. Low success rate.

example , one of the most popular Legendary craft - 7sin

Seven Sins
Shoulders
Legendary Shoulders
286
Armor
+35-42 Strength
+35-42 Dexterity
+35-42 Intelligence
+35-42 Vitality
+41-45 Arcane Resistance
+4 Random Magic Properties

* All 7 sin craft will 100% give you 35~42 ALL Stat, 40+ Arcane Resist ( Which is worth nothing )
Plus 4 Random Magic Prop.
Meant you have only 4 chance to roll the stats you want.

Compare to +6 craft, legendary craft just a pure joke.

Just to share with you, crafting legendary is just gold-shink activity.

Crafting in overall, Legendary do not give efficient ROI ( i usually obtain good stats gear after 10th run ).

Barb Specific Gear consumption rate lower than general use gear. ( slower to sell )

If you obtained the HoC recipe from loots, you have a good start then. Otherwise, purchasing recipe from AH and craft/sell, it would be a long way to reach your break/even point.

If you do have a choice, Legendary always not your best ROI recipe ( except legendary/set below iLv60, brinstone excluded )

0.8% = 1000 salvage give you 8 brimstone from Magic i60-63
0.1% = 1000 salvage give you 1 brimstone from Rare i60-63

i think this explained why brimstone so hard to salvage from rare/magic gears

....

Did blizzard guarantee every 800 salvage will give brimstone?

Did Berjaya Group Guarantee a win every 800th purchase of lottery?

Sorry my friend. Random.

there is 0.8% chance you get a brimstone from salvage only 1 blues.
BUT
There will be also around ~0.8% chance you will get nothing from salvage 1000 blues.

some called it Math
some called it Luck
some called it Conspiracy

Bee, add me in-game. I share with you how to get reliable source for brimstone.

The only resource we can manipulate is Gold-USD rolling
Once you master this trick, you got everything you want in game. ( materials, recipe, item, golds )

Minimum Requirement :
1) RMAH Access with Paypal Link
2) Initial investment of RM50 / Gold 10M

----------------------

Result, endless supply of everything without farming.