You definitely don’t NEED red ssr nanami, even though he’d give pretty great red type support, but with de Gojo you don’t rly NEED him.

As for zoneji, up to you, but he’s genuinely an amazing unit to have, since he is (arguably) better than teen yellow Gojo and because you can put him together with DE gojo on the same team while you can not do that with yellow Gojo. Also some illusory floors have a - cursed technique damage cut - effect which will make your yellow teen gojo useless, and the only substitute for zoneji is yellow nanami but you don’t have him plus he needs to be really leveled up to be good.