First post, new to D&D. I currently have one build, human fighter. I`e given him TWF as it sits nicely with his character. Currently at L3 and intend to take Dual Wielder at L4. 

I note that past L5 TWF starts to fall behind GWF for DPR output....this doesn`t bother me to much but i like to stay up with the rest of my group. I have just been granted a wish, and I would like to use it to bridge the gap between the two styles regarding DPR.

I`m thinking of wishing for a pair of magic longswords with a damage modifier that increases per level. I be really interested in your thoughts and on what short of modifier might work best. The DM in onboard. 

Thanks,