Sounds to me like this Lag for the most part would be your physical internet connection directly from your provider... server lag isn't going to be more than 200 ms or so in which case you wouldn't be having a drastic issue of not being able to get behind your target.soo unless my target is standing still i cant seem to get behind them for shred how do i find the best server for my area for less lagg i would say?
And with that you can't get behind someone?my ms is 60 world and home i have a 20meg hsi connection. hmmmmm
Maybe you need to lower your video settings? This helped when I got laggy playing in Pandaria.
Not to discredit you my dear, but video and local hardware settings don't affect lag, which is latency (time that it takes your network to communicate with WoW servers and back again). You likely freed up processing power and memory when you adjusted video settings that made your computer process and render imagery quicker
If OP is rocking 60ms latency on a 20mb connection and having problems with abilities, it's likely a player error or his internet connection isn't what he thinks it is.