I suppose I am an advocate of confluence, but the issue of multicollinearity really needs to be taken into account particularly with TA based systems. Often the confluence that people think is there simply isnt.
I think I came to the conclusion that excessively complex systems based on confluence tend not to perform much better than relatively simple systems, but relatively simple systems that uses confluence from different basic types of TA (volaility, trend, S&R etc) tend to perform much better than one thats based on a much simpler signal.