Are you useing Kick's porfile? If so you can fully customize it Just open it with the windows build in editor.
Just search for repair/drability/vendor or something like that. Im at work atm and cant look into the profile.
find this vendor that further to do with it? ) <Vendor Name="Talaara" Entry="19001" Type="Repair" X="105.5018" Y="4337.619" Z="101.466" />
You need to find the line where you can edit the durability, this is only the line where the vendor is located.
I think 0,1 is 10% or seomething like that, set it to 0.3 or 0.4 and watch what the bot does when you reach 40% or 30% durability.