Well, while I'd like to see some regular trick play, Niou's main purpose is to turn into a character who would be interesting to see in that situation but can't be there in person for whatever reason. So in my mind it's less about whether his partner is good at doubles or not, but rather about some combination of interactions and fanservice.
He turned into Tezuka and Shiraishi in the nationals finals, so that 1) Seigaku would have to overcome the three strongest in the singles matches and 2) Fuji could face off against his nemesis. Then in the revolution matches it was probably mostly to give the Golden Pair a final bit of screentime similar to how we got a few panels each of Inui/Yanagi and Tachibana/Chitose. And finally in the G10 challenge having Atobe/Tezuka was supposed to be a bit of a dream doubles I imagine, and of course it was interesting to see Tezuka's techniques against opponents that strong.
In the same vein I think an Akutsu/Niou pair would be interesting because Akutsu is still obsessed with Ryoma as we've seen both in his flashback and prior to the 2/6 match. Not only would the interactions between the two probably be pretty funny, but it would likely also give Akutsu's character a chance to further develop.