As a Kled lover and Heimer main. Dodge his E, even bait it actively Then you can even all in at that time. Get hydra first item so you can play against the siege pressure.
Watch/bait their skills. Then just all in and dive despite of his turret. if E Q hit, you will win in any circumstances. Remember that dismounts will remove aggro from turret, giving you even more chances to chase him to death. Don't overthink it, just ungabunga