STR does very little to your WS. The Regain is pretty insignificant on 1 handed weapons, it's real benefit is for 2 handed where it could help with with x-hit builds.

15% TA is not 15% TA as you're aware, the more you increase the less it gives proportionately, so ignoring that and stacking DA in it's place is doing far less over time.

23% DA and 18% TA is way better than 28% DA and 3% TA...

Also Apoc will increase your DPS significantly more than VV ever will, Apoc isn't just about WS numbers ya know.