Here's the thing official. SEN crafters are not needed at all anymore.
CON Crafters craft higher durability items. This increases
Armor: Dodge
Weapons :Accu
Now. ALL crafted items are on a number grade scale [currently 1-8 //9if you include dungeon items but they're not craftable with exception to the wings//]
A Moderate SEN amount [even just the SEN crafting set] can produce max stat grade 1 items.
Using the Enchantment Scrolls to xfer the max stat grade 1's to the ones you CON crafted produces the absolute BEST items.
So adding SEN as a Arti is absolutely pointless. Always Max CON, then you have options of Crafting anything in the game assuming you spend the SP on it.
Cheers/