He'd know to put all of his strikes on Armando's torso, legs, or head, but Armando can generate enough arms to form a shield around him, while pressing an offensive. The longer the battle plays out, the more arms Armando can generate, meaning that the superior durability will let him last long enough to produce enough arms to just overwhealm him.
Seeing as he can see the future, Izuru can destroy the arms to avoid that potential threat, before it becomes a threat, with his Ultimate Analyst and he can manage to destroy those arms with his combative talents like Ultimate Soldier and Ultimate Martial Artist
The issue is that each individual arm can be created with special abilities or esoteric materials, and he can make high explosives or do the neutronium trick and that can cause Izuru to lose his balance with gravity anomalies, as well as create poisonous stingers that can make Armando seal a win with even one or two hits.
What's the range and radius of high explosives or the neutronium trick?
The issue, though, is that Izuru can't easily harm Armando because of the dura gap, meaning that it will take many consecutive hits to meaningfully hurt him. I feel like that gives Armando enough time to spam arms that can swarm the battlefield, and even with precog he won't be able to avoid all of them should he get into the hundreds.
He can deal consecutive hits to hurt him, undoubtedly, I already talked about how he's superior in hand to hand, even with the durability gap, the skill gap in the talents and hand to hand skill is enough for him to deal consecutive hits. Even if there's a hundred arms swarming the battlefield, even though it's unlikely because Izuru will counter the stacking of arms before it becomes a threat, Izuru has been shown to effortlessly stomp a
girl with just a backhand and not breaking a sweat, a girl that can fight hundred of these
maniacs while actually being shot by mounted machine guns at the same time, so they are not really a problem for now.