I had this problem on PS3 but after I switched to PS4 I'm having no more problems and I keep everything to max anomy connection isn't even that good. Anyway the easiest things to do are changing to ethernet instead of WiFi, reduce or remove the other players graphic effects, it's in the character or system customisation, I don't remember now. If it is still not enough you can reduce/remove the graphic effect of your party members and last you can change from Full HD (1080) to HD (720) but I wouldn't like this idea.
