Well, if you have access to PC even once a week, you can participate in KP sharing program without big issues.
Considering Coldfire's feed effect uselessness and lack of repair after feedback, it should be 1 old artifact = 3 coldfire ones lol3 coldfire artifacts to 1 old one? yes, why not and thank you - at last we have this possibility
3 old artifacts to 1 coldfire? ha ha ha very funy