Jujutsu Kaisen: 8 Most Dangerous Cursed Techniques\n\n Unfortunately for him, this ended up being his demise. He was forced into combat against Sukuna and, even though he tried his best, he failed to defeat him, which was expected. Jogo died in this fight, however, not before his strength was acknowledged by Sukuna.

It's stated that he's propped up by Jogo to be the leader because he can grow stronger, presumably stronger than all of them. Jogo's got range, speed, and power, but Mahito's more durable with Distored Spirit Body of Instant Killing (I think I got that right?) and has better hax and endurance.