There is a unknown bug with Wormgod Caress exotic arm when unlocking 'artifice modification slot' and applying any extra +3 stat. Overall stat won't change. I have 58 points of total in my Strength but using 'Strength-Forged to add +3 won't make a difference and boost up to 61 in overall strength. It keep at 58 no matter what but all stat forged modifications are doing the same thing.