If you miss with groundslam you miss every target at least, it's not the same with LA?Just don't really need it because of how many times LA hits. If I miss once don't really care considering every time I hit them my arrows hits them like 3 times each and each shock stack makes them do more and more damage. I would rather use those two points for the 16% chaos resist.
The top ranger Nugi says in his guide that you should NEVER EVER drop resolute technique...
With 87% hit chance I notice I miss a lot.