naruto could sense negative emotions and could sense and smell pretty good because the fact that he's a ninja and all those moves he could dodge because in this picture he dodged a's attack which was going hypersonic speeds
he can take out luffy using this move turning him in to a frog and easily breaking him he could kill ichigo with the rasenshuriken which paralzes your cells to a point where you cant move and most likely death
i still go with beast ball or rasenshuriken
1) I'm fairly certain that doesn't matter. Being in an separate realm of existence probably beats emotion sensing. Even if not, Luffy has no way of seeing him. And since neither of them could see Ichigo, and this is a free for all, Naruto would probably aim for the obvious, visible threat: Luffy. Who would retaliate, and they'd both be blindsided by Ichigo without even being able to react.
2) That move only worked because they were trying to restrain him. Naruto gathered and drained off excess sage chakra into the Path holding him, which resulted in him turning into a frog statue. The only move in Luffy's repetoire that involves prolonged grappling is his robot move. And due to Naruto's chakra cloak, getting a hold of him like that, on top of serving no purpose, would be quite tricky. Ichigo, being a swordsman, has no moves that require prolonged physical contact. And in regards to the Rasenshuriken, it takes time to travel through the air when thrown. To the point that it's fairly easily blocked, dispersed, or dodged. Even when a straight up charge is used for direct contact, that's still limited by the user's speed. And it's already been determined that Naruto and Luffy can't hit Ichigo. IF Naruto could hit Luffy with it, it might be enough to take him out. But with Luffy's speed and his foresight, that's no easy task.
3) Since I've already addressed the Rasenshuriken, the Beast Ball is a massively destructive move, true. However, Ichigo could swipe it away with a mere swing of his sword, not to mention matching and SURPASSING it's destructive output with equal ease. Again, that's under the presumption that they could see him. Which they can't. So they wouldn't even be launching attacks his way to begin with. In terms of sheer destructive range, Naruto has Luffy beat. Luffy has no area denial attacks, but at the same time, Naruto doesn't have any substantial durability feats that I'm aware of. So if Luffy can lend a few decent hits before Naruto can, Naruto probably goes down.
Either way, if Ichigo's feeling lazy, he'll watch 'em trash each other, then drop the winner. If not, the fight's over in a second, Ichigo walks away without a sweat or scratch, Naruto and Luffy's last thoughts are "What the hell just hit us?!"
What's your reply, Trollboy?