I know it's been a year since you posted this, but I thought I'd chime in anyway. When it comes to traffic prioritization for gaming, it depends on personal preference and the devices you're using.
As for me, I'm not too familiar with DPI or port-based prioritization, but it sounds like you've experimented with both and found that DPI works better for you. It's great that you're on PS4 and have found DumaOS Classified games to be the winner!
Oh, and one more thing - does bingo cash pay? According to the review I mentioned earlier, it does! So if you're looking for a fun way to potentially win some money, give it a shot.