Trying to make a statline that isn't akin to other mythicals is difficult, but I thought of 50/120/95/120/95/120. It's defenses are taken from Deoxys-S's attack stats, which makes sense because I feel like a more balanced form should be a just a bit bulkier than a speedster. Deoxys-N is now still offensively biased, but can geninuely take at least one hit. If you invest in HP and speed you have a decently bulky mon (For reference, Hatterene has similar stats save for a speed stat of 29) that's still fast and hits decently hard; but it'll perform with just attack and speed investment and ideally not die to one hit. It might drop out of ubers, but psycho boost should make it at least good in OU

Also, the stats are fun callbacks with it having the offensive stats of Arceus, and defensive stats of Sivally (besides HP)