My search-fu failed me here, if anyone can point me to a thread that already discussed it, feel free to do so.
Now that the good old 45hp goggles got some competition in form of the magewright goggles I wonder if I'd be better advised to get spell pen IX from the goggles and move con opp to the helmet slot. The character in question is a human pm who would readily benefit from spell pen ix for wails and mass holds. I'll miss toughness from the minos but I think I can go with the Tharaak Bracers or slot toughness somewhere.
Now, is there anything else to consider or would it be advisable to craft con opp on my helm?
Bracer, Gloves, Boots are all good options for an Arcane (although less so if you're going Tharaak bracers). I don't recommend boots for non-arcanes, because their access to Haste is far more limited.
Basically, any slot you can name for a GS item, you can also name a decent something_else that goes in the same place. Up to you what you value most.
Kobold sentient jewel still hate you.