Since there are too many variables you did not list, I will sum up your entire goal as ashe or any other adc- do what it takes to stay alive while doing the most damage. J4 can eq ult and flash. Maokai can root and flash. I'm assuming if you get caught by any cc you are dead. Since both of them are melee, they will use spells to clear minion waves that reach the tower. At that moment they do, if they don't have flash they won't be able to cc lock you, and you can throw 1-2 autos per wave at the tower
this guy is right
You need to give us more info before we can give u a good desicion
otherwise do what dmg u can without dying
Ok more info. Top and bot lane of both teams are dead, jungle went back after the fight. Xerath and I remained. Xerath almost full HP and mu ult came off cd. I have Ghost + Flash in my kit. Have a Statikk shiv and a BF sword. Not much lifestal (double dorans). Movement speed 385 or so.
J4 has his ult Maokai half mana cause he kept tossing saplings. Jarvan walks to the left side of the turret and stands there. He's not in range for Xerath pokes though cause he keeps dodging them.
Xerath has some AP but not enough to instanuke any of them. He can whittle them down but it'll take some time.