There isn't any way to properly balance this version of Rohan any more.

Strelley yes it's possible to hardwire weapons to drop with set + or % attack forces, just the same as staves are hardwired with mana %. To be honest though if you're going to have a set amount of + attack per weapon part it would just be easier to increase the base weapon damage itself, although of course having the stat there looks nicer Unfortunately + attack isn't a possible random stat for drops which is annoying so back to the drawing board, however I'm doing a bit of experimenting with craft gear.

A +30 crafted weapon has near enough the same damage output as a max % 5th tier weapon. I wonder how intentional that actually was eh. At the end of the day I need to remove as much % attack as possible from the system and replace it with + be it stats or attack. Gathering and producing is boring and expensive to say the least and way too challenging for people with low defence and mobility. I need to find some way of incorporating crafted weapons into the forging system or somehow get sockets working on non-crafted gear. None of that is as simple as you'd hope and probably beyond what I can do.