I have really no good title for this.
However as most people are well aware you can craft many low end craft materials into something of higher value using a few catalysts.
http://wiki.guildwars2.com/wiki/Mystic_Forge#Fine_Crafting_Material_Promotion
As such
50 Small Claws
1 Claw
5 Pile of Radiant Dust
5 Philosopher’s Stone
Can give between 5-12 Claws (Maybe set this to just 10 the randomness seems a bit pointless)
Would we be able to get the reverse so that the low end items can balance out a bit more.
So for 50 small claws
10 Claws
1 Small Claw
5 Pile of Shimmering Dust
5 Philosopher’s Stone
I believe would allow tiers to scale better for the market place so rather ages to get the market settle it could be quicker as the raw materials can be processed up and down with a catalyst.
Admittedly I haven’t tried to see if already works, but from reading there isn’t a way to downgrade items of a higher value.