I hunt some of the trashiest parks in Chicago Dude and I run my disc. line to 28 and that is it. I do use the 4 Tones instead of Multi so maybe that helps. I been using Tone I.D. Detectors for about 16 years so maybe I'm used to all the noise. But that is the way I hunt so to each his own.
Sorry but I'm a very selective hunter. not a beep-n-dig. I'f I'm going to bend over it's going to be worth it. I did my time of digging every little peep and pop for 20 years. I'm well over it. I started using tone ID when I first got my Minelab SE roughly 15 years ago. Before that I had detectors with tone ID but never used it. I'll shoot you a video to give you an idea of just how insane running an open pattern would be in our park and then you'll can decide LOL. I get at most an hour or two to hunt when I got hunting and I'm not about to spend it chasing trash. I come home with keepers for my short time and that is how I plan it.
Like JFlynn suggest, I am a cherry picker to the max. You're welcome to walk behind me and pick up all those keepers I'm missing. It has been tried before LOL.