Ruckus easily rips through Androxus, and even if he tries to use Reversal, Ruckus can activate his shields to negate any damage fired back at him, and if Androxus tries to escape, Ruckus can easily jet over to him.
You can encourage him have to get close enough to shoot by using the shield Legendary to block shots and give him room to advance. If he tries to contest you on point then you can use Kinetic Blast to knock him off and use your shield to stay safe.
If a Grover is by himself, this can give any champion with decent mobility a chance to close the distance between them and Grover. The closer you get, the more damage you do and the less damage Grover does. Don’t forget about the vine though!
These two champions both counter each other in different ways. Kinessa can deal killing blows to Skye, while Skye can escape Kinessa's line of sight and easily murder her. When playing as Kinessa, put as much distance from yourself and Skye.
Mal'damba is the best healer for duels, if the Androxus is foolish enough to get close to you where you can comfortably hit your shots and the reload stun you CAN win, but if he doesnt good luck waiting for respawn.