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I will have to say we don't know enough to know trust 100% where special abilities can come into effect. Remember too that devs have started not all abilities are shown, so some could also be used in other calculations without animation of comment.
In the case of Riyahi... it's easy to think... play often starts from the GK, if he can pass up to DC with good passing and playmaking, that will be a good option compare to usual DC abilities.
Shooting, finishing, creativity, passing are all grey skill for a DC, but still they will score and create goals in creative ways.