Try to separate him from his turrets and wait out his shield because of the short duration of the shield. Do not let him be first on point and set up turrets.

Grover can fing it hard to hit androxus because of the slow rate of fire and andro's high mobility

Try to take out ling range targets like kinessa. And try to predict the position of fast moving champions. Be the last one down by timing your heals so that your team can regroup around you even if you die by then