Taron Malicos seriously struggled against Cal in sabers. Meanwhile, Cal was extremely impressed by Cere's combat performance against a bunch of Purge Troopers, implying her lightsaber skill was above Cal's own. I'm inclined to give Cere the lightsaber edge against Malicos.
For Force powers, Malicos is much more knowledgeable, but he explicitly drew power from Dathomir to fight. In a neutral setting, I doubt he's actually much stronger than Cal. Meanwhile, Cere was able to slow Vader. I'd give it to Cere.
3. All out, Cere should take it, imo