Technically, Indra is weaker than Sasuke due to lacking the Rinnegan. The latter only possessed Sharingan, a lesser version of Rinnegan. His Yin power, however is equal. Regardless, Madara possess all of their techniques and power as stated: [
You must be registered for see links
]. Sasuke and Indra lack their opposite components to fight on par against Madara. With the Rinnegan, not only he can absorb all of their Jutsu via Preta path. He can manipulate the direction of their attacks using Deva path's gravitational force to do: [
You must be registered for see links
]. So easily, he can throw back their attacks directly towards them. He can replicate Chibaku Tensei's scale using Asura path, and thanks to it's highly destructive power at the hands of the original wielder of the Rinnegan. If Madara wanted to, he can perform planet scale techniques, as stated that Hagoromo was able to create the moon, and Madara being an equal to Hagoromo both in power and skill means he can replicate this. He can combine his Perfect Susanoo with Juubi as mode, and combine it's destructive attacks: [
You must be registered for see links
]. There is also the fact, he can awaken the 3rd eye and perform identical techniques to that of Kaguya.
Sasuke's and Naruto's wankers need to get this in their thick head, that they will never be on Madara's level without working together. Madara takes this match low diff. Add Naruto and Ashura, and Madara still takes this low diff.