Here is what I am talking about:
- at any given level, if you look at both bound and unbound shards that are at the **same completion chance**, the amount of materials required for the bound will be greater than the unbound. Or at least - I can find lower material shards to craft at or near the same completion chance. I will scan - looking of the 9/12 in unbound. Usually, if I find some, if I look in the bound list, the materials for the shards I can craft will be higher.
I also admit that, because I craft in bursts (using crafting XP pot), I check the lists first, then do my crafting. I don't have time while the XP pot is counting down to examine exactly how the XP drops for subsequent crafting of the same shard. I may do "a few " in a row, if the material amounts are "small". I also do not go back and forth between bound / unbound.