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!
A good card to check when there is an enemy Makoa is Barrier Reef (Link to Barrier Reef image + desc: https://paladins.gamepedia.com/Barrier_Reef) if he is running it at Lv 4 or higher, ignore the shield so that he has to wait longer for his shield.
Don't face Strix head on. Pouncing head first may result in a (skilled) Strix sniping you up close, if caught in his scope. Sneak behind him and lower his HP with your knives. Once he knows you are there, pounce on him to finish him before he hides.