Not so untouchable now.
Kakashi and Guy notice that there is a crack on Tobi's mask. Kakashi is pretty sure Naruto didn't hit Tobi, but then he remembers the kunai that he sent to another dimension with Kamui and gets an idea. Bee tries to attack the Mazou, but Tobi erects a barrier to protect the Mazou. Kakashi wants to try something out and gets the team to attack Tobi. Guy leads the attack with his multi-segmented club but Tobi easily evades and tries to absorb the weapon. Naruto charges in with a Raesengan which Tobi avoids by becoming intangible. However, Kakashi sends Naruto's Raesengan into the other dimension with Kamui and Tobi is hit in the arm by the Raesengan. Tobi figures out what Kakashi had done, and Kakashi figures out that Tobi uses the same technique to teleport stuff and to become intangible.
So it's down to a contest of dimensional jutsus. The always sharp-eyed Kakashi found a way to hurt Tobi in his intangible state by using his Kamui on ally attacks, and this may be the key to beating Tobi. On the other hand, Tobi now knows what Kakashi is up to and can try to avoid same trick. Tobi also has a Sharingan and a Rinnegan to pull off ridiculous techniques with, and he will likely target Kakashi given Kakashi's Kamui is the key. Naruto's Raesengan didn't do that much damage to Tobi, and in hindsight maybe Naruto should have gone for something more damaging. The fight is probably not going to get any easier for Naruto and his allies. If Kakashi gets taken out, then Naruto may have to channel his dad's skills and use speed/Flying Thunder God to beat Tobi.