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.
Skye effectively counters Kinessa, as first, Kinessa doesn't have any reliable movement strategy, and she cannot self heal. Additionally, Skye can evade Kinessa's shots, unless by some bad luck, gets hit by Kinessa, which means Skye can get close.
Ash's shield is small compared to the other tank character's shields (Height-Wise). If you can, try to get above her shield or go around it to attack her.