trait point cost to increase damage

I’m playing BE for the first time and I am really excited about the flaming death rocket hammer I am burning up for my Kerrn Piilosihver. I’ve based it so far on the security baton, the most basic hand-to-hand weapon for my tech index (low); but I would like to get its damage up to where it might be able to hurt an armored guy. How many trait points would a straight damage boost cost?