the required amount of mats for planks and shafts doesn't seem right. planks says 45/44 and i can make 11, shafts says 45/40 and i can make 5?

I know, at around lvl 14 the materials needed to craft take a huge amount of time to come by. That would not have been a problem if the items were something more special but tiers give you around +90 - 115 hp and +15 - 35 mastery per item. At one point I think it would be wiser to skip a tier and save up to craft the next, because it just doesn't make sense to finish obtaining a set and immediately having to pay even more resources for measly upgrades. I think that reducing the cost or making the items better will fix this but i could be wrong. Amulets also cost a huge amount of resources and give weak stats for that price in my oppinion. Any thoughts on the matter?