I could understand the oppositions position. I just hold my stance because Sidious had been draining the population of Byss for 2 years before the events of TFU before Galen pushed him to desperation. Mara seems to be capable of holding her own against someone like Caedus in a Force engagement. I'd say they could take this in a close match.
"Jacen was on the knife-edge between dying and killing. They grappled, Force-pushed, Force-crushed: he threw her back again, trying to Force-jolt her spine and paralyze her for a moment, but somehow she deflected it and bricks flew out of the wall as if someone had punched them through from the other side. She almost Force-snatched the lightsaber from his hand, but even with his injuries he hung on to it. He wouldn't die. He couldn't, not now." - Legacy of the Force: Sacrifice.
I never denied the events of Byss, the denial comes from Palaptine's desperation at the hands of flailen. Where is it? As for Mara, we both know that's not a fair comparison given the bat-manning done beforehand, and unlike Jaina it can't be argued that they'e both diminished from injury, pain or trauma. But still, the point in question is that Caedus isn't remotely comparable to Sidious by either feat or accolade.