The team have a chance against AotC Anakin, considering Kylo's strength in the Force is described as "Immense" and Rey rivals him, though it purely depends on the battleground. If it's in a ranged space, Kylo could probably have Rey distract Anakin, use Force Freeze and have Rey deal the finishing blow. In a close quarter fight where Lightsaber combat is the only option, Anakin still wins given his performance against Dooku was significantly better than Obi-Wan's, regardless of Djem So being more effective on Makashi. I highly doubt Ren's on par with one who rivals most Jedi Masters, considering his best solid feat was slaughtering a dozen or so Padawans with help from a few other turned students, plus Luke didn't seem to be trying to fight him seriously and was just buying time at the end of TLJ.