Athletes did well with PA, PO or PAO over the years (a significant part of the memory community uses PAO).
It’s all about speed of translation as @TheHumanTim said.
With PAO/PA/PO (Single-image systems) you have 52 elements to consiously encode into images.
I’d suggest if you want to test your card memorization with simpler scenes? Like PA (Person-Action) or PO (Person-Object). Simpler scenes might be your thing.
For example:
2 of Clubs - 5 of Spades: Benedict C. / playing an acoustic guitar /
and move on to the next locus etc.. It will take you 26 loci to memorize a deck but usually simpler scenes are easier to recall.
Later when you train well and you get used to your images, you can try PAO again and see how it goes.
It’s all down to personal preference and how much time you have in order to invest into training fluency with a system.
For e.g. I realised that encoding 52 elements is not “good enough” for me so I started working on 2704 image system where I would be able to encode only 26 elements per deck.
It’s all down to your personal wiring but I guess if you pour so so much time working on PAO without dropping any elements or simplifying your scenes you will eventually see results as you get better at seeing your images. But again, as with everything in life, takes time.
A tip from @climbformemory I read somewhere was to carry one card every day in your pocket and constantly look at it thoroughout your day, see vividly who the person is, what the action is and what the object is. After a month and a half, you will have spent many hours looking at each card every day you would be able to instantly see it’s PAO.
Another advice I’ve tried previously is to forget the memorization process and just drill and build PAO scenes in your head while you’re holding the deck. Just see the PAOs but don’t remember them. Learn well to chain P-A-Os together. This will help build your fluency even further.