There is no "good" clothing, clothing depends on what weapon you would use, for example if I use Splatershot Jr. I'd use sub saver clothing, Special charge up clothing and special saver clothing. My top weapons are:
Aerosprays, Splatershot Jr., Carbon Roller Deco, And E liter 3k scope.
Tips: always look for snipers, hide a lot in ink, don't jump unless you have to while hidden, jump a lot while in inkling form, aim the camera balanced but more facing upward to ink more.