Ryu is top 10 maybe even top 5
Ryu has THE BEST durability in the series he's only been seriously hurt by two attacks, the first was his own granite blast and the second is a Meguna cleave(Had to try multiple times kill him)
Sukuna confirmed that Ryu has some of the best durability there.
Ryu's speed is nothing of note, he's around or equal to Yuta in speed. I don't know if their training made them any faster since they were focusing on techniques and skill but regardless most people(Geto and Kenjaku) are still slower than Yuta
Ryu has amazing DC due to his CT Cursed energy discharge and his main attack granite blast, remeber that he can shoot the blasts anywhere he just chooses the head cannon.
His AP is also excellent since we can scale granite blast directly to himself. Both times he got hit by his attack we see two different but important reactions.
The first he comments that his attacks hurt like he'll.
The second he GET BURNT LIKE JOGO.(Even then he's still alive)
He also has the potential to one tap fully manifested Rika and has been on par(physically) with her by continually blowing her back.
Ryu has good H2H consistently boxing with Yuta
Ryu also has a domain expansion, in which we will have to assume the powers of it. First we need to remeber these things
We must remember that his CT IS NOT GRANITE BLAST, GB is simply Ryu's main form of USING his CT
His CT is the ability to shoot out his CE in any way he likes from anywhere around his body
From these we can assume Ryu would have his range and power Buffed whilst in there. His CE attacks will be exponentially stronger, and his sure hit would probably kill anyone who's unfortunate enough to be stuck in there.
Him having RCT or Hollow Wicker Basket is unknown but I think could assume he has HWB. RCT could be possible but I dunno we can leave both out since I got no clue.