I wouldn't recommend this sort of PAO system, standard letter pairs will give you more variety and will help you in the long run
Journey also isn't too necessary, you can experiment with it but it's unlikely to be helpful
Best thing you can do is just practice as much as you can, and see DNFs as...
@ everyone saying that noddon creates an advantage:
the exact same advantage can be gained due to the lack of a sight blocker for the first few turns of execution, which is caused by judge reaction time...
Memo corners first, execute edges first
Experiment with audio edges
If this doesn't work, try memoing edges first and executing corners first, with audio corners
The most important factor is practice however
4bld hardware isn't like 3bld where you need fast and loose cubes, I use an aosu gts2m with tensions a bit tighter than stock and traxxas on all the contact points. I haven't tried a cube where I can execute even close to as well as I can on mine