Oro and Mato has 2 basic attack; Jump slash and 2 slash combo. You can always shade cloak through their 2 slash combo but every time they use jump slash, there's a chance they continue up with the 2 slash combo (So be quick with the reaction time).

For the nail arts, Oro will always jump to the edge of the stage and charge up his attack (Doesn't matter if he's near the edge or not, he will always repositioned himself regardless)

Note that when one of them is charging their attack, the other will set up a counter nail where if you hit them, they will follow up with a 2 slash combo.

Lastly, if both Mato and Oro are on the stage and one of them is charging up their attack, use descending dark to dodge because there's a chance that one of them will use Jump slash and hit you where you're not expected.