I play a similar system and have had plenty of success with it. I can talk you through what I do if that will help in any way.
In midfield, on the same side I have my support striker, I have a Mezzala on Attack. This provides some width, as well as interchange and rotations with the support striker. I do go for an AP in the 10 role, either on Attack or Support depending on how positive I want to be and don’t find them to be too much of a magnet for the ball.
In defence, on the same side as my Mezzala (a), I have a WB(s). Relatively positive but doesn’t neglect defensive duties. On the opposite side, I go with a FB(a). He will then be covered by the Carrilero. Being symmetrical doesn’t always function well so this means lots of different spaces are being filled and creating plenty of different rotations across the field.
Team instructions - What I would say is that this system doesn’t necessarily lend itself to high pressing. That’s not to say it can’t work (before anyone tells me I’m wrong), but if you think about how many players you have in this system to press the opposition defence, you’ll always be outnumbered unless your full backs or central midfielders go sprinting wildly out of position in their attempts to press. That’s also not to say that you should tell them to Regroup; I keep everything on balanced - mid block press (or low block when I’m an underdog), standard defensive line, no counter press or regroup. I do have More Often for pressing, but only once the opposition really get into my half.
I’ve always viewed the narrow diamond to be a defensively solid tactic rather than a defensively aggressive tactic. You’re essentially flooding the middle of the park and forcing the opposition out wide (I also don’t want them having an easy ride crossing the ball so I have Stop Crosses clicked as well) rather than trying to catch the opposition with the ball in their half - ultimately, you don’t have enough players to match their defence and press effectively.