Wait, so you're telling me Black Panther is on Reed's or Luthor tier of intelligence? I didn't know that. Daaaamn.
And I think you're lowballing Bats against Spidey with preptime. Bats is smarter than Spidey and has waaaaay more experience. if it was a cage fistfight Batman would surely lose though.
Not on Reed's level, no. Reed/Doom and Luthor are the Top 3. But from the rest, I'd say T'Challa comes out on top. Though Hank Pym deserves a mention. He essentially built a TARDIS (his Avengers Mansion). Personally I'd put Doom above Reed cause he;s the only one in the Marvel U to create a time machine, but Reed's got a whole lot of crazy **** in his arsenal, so it's a tough one. The Maker is smarter than both of them combined though.
As for Batman, it depends. I wouldn't say smarter, I'd say more focused and with better resources. When Peter was 15, he created his very own web-fluid and a special tracker that tuned into his Spider Sense's frequency, with nothing but parts a broke 15 YO kid could find. Not to mention these feats:
Getting a Cosmic Cube to work while stuck with nothing but the most basic of clues (Spider-Man vs Wolverine):
Teaching Ultimate Iron Man how to open an interdimensional portal:
From Invincible Iron Man, Parker builds a tracker not even Bleeding Edge Tony can detect:
Corrects Wakandan Math:
Disarms a bomb neither Stark nor Richards could disarm:
Has an IQ north of 250:
Same scores as Reed in his age:
I'm not saying he's 100% smarter than Bats, but Parker's a damn beast.