What affect does wrong level gear have?

[Shyd]

Tools and Weapons generally suffer the biggest reduction in stats when not using optimal rank. Accuracy goes down, Attack is generally the same as last weapon you had on, Crit Hit goes down.

Gear and Jewelry tend to not have a severe stat reduction. And the Defense, Resillance, Evasion etc etc. goes down while the base stats Str Vit Craftmanship does not suffer that much of a hit.

IMO tools and weapons you want optimal rank, gear is really wish washy~