Your answer's right there. If Nidoking runs mixed it's best to work with maximum power as 85 speed is quite average, unless you run scarf by which you forfeit some power over LO SF. And even then there are better scarfers out there.
Infernape gets a fancy new movepool too. It's also unique because it's the only mon with all of: Nasty Plot, Swords Dance, Mach Punch and Vacuum wave. Meaning Infernape can run a sweeping set from either special stat WITH priority, it can run a mixed set with both stabs from either stat (previously, it's best bet was CC+fire move, which would be either Flare Blitz or Overheat, now it can use Vacuum Wave+Flame Charge, or Mach Punch+Incinerate etc), It can also run Double Kick, a move that breaks subs, plus whichever priority it wants. It has several buffed up moves: Aerial Ace, Mud Shot, Rollout, Rock Smash (stronger each turn as it lowers defense), Acrobatics, even U-turn and Thunderpunch. It's going to be sooo good in this meta.