"Deku can kill Ripple in 1 punch if he gets a clean, direct hit. Ripple can kill Deku with well-placed shuriken in forehead/neck/heart and Deku has nothing to actually block the projectiles (like a shield or barrier). Or Ripple needs to damage Deku over time."
Deku should be able to knock out or kill Ripple with a 20% air blast, so he doesn't need a direct hit, Deku's forehead/neck are not weaker than the rest of his body, since Chisaki attacked his neck and he was still able to fight, and to attack the heart directly you need to destroy his chest, and Deku can use his iron armor soles (That can withstand High 8-C+/8-B attacks) to blocks some attacks.
"Deku needs a short charging time before using a specific % of One for All. During that time, Ripple will have already thrown shuriken, since her weapon summoning is instantaneous."
Not really, and I'm pretty sure we assume that Deku have Full Cowl at the start of the fight.
"Deku's punches creates shockwaves of violent winds, causing him to have equal range to Ripple. Ripple can resist the wind force created by the punches and still move through them."
Ripple can only resist the wind resistance while moving at high speeds, not air blasts that can hurt 8-C+ beings. "Resistance to air resistance (no matter where or how fast she moves or fights, she won't be hindered or slowed by air resistance" this resistance is ********, anyone in fiction that can move at high speeds has this resistance.
"Deku has more AP and Durability. Ripple has homing attacks, resistance to fatigue, more agility and faster attack speed (even with equalized speed, attack speed remains proportionally higher to combat speed)"
Deku has also faster attack speed with his air blasts.
I'm gonna tell you what's going to happen, assuming that she is not going to fight in close combat, sooner or later she will be hitted by air blasts, considering that Deku can fire 5 air blasts at the same time, and that they can hit
people faster than Deku, when that happens everything would be over, she wouldn't able to run from Deku anymore.
So, I'm voting for Deku for massive AP and durability advantage, he defeated a guy who can casually defeat five people much stronger than Ripple, he is also smarter and have more combat experience than hers, and surprisingly, Deku have the range advantage.