Malicos scales above the second sister though. Cal needed help to beat him whereas he beat the second sister straight up in their last fight. So it should be a close fight but Maul still wins.
And the second sister is nowhere near Maul level either.
I think Malicos' real power lay in magicks rather than fighting. Like how in one of the Force and Destiny Era Sourcebooks, it said that force users could conjure stuff out of nothing.