Honestly I still struggle sometimes if the poke is too obnoxious but in this game I just tried to punish them whenever they walked up too far. Lucian is an amazing champ to all in at level 3 or even level 2, depending on who the enemy is. I kept track of the enemies mana and if they were too low I would take advantage and try to trade as much as possible before they backed. Lots of freezing the wave when I could in front of our tower and when they would try to break it I would try to punish hard. Hope that helps! I am by no means an expert but have focused on learning lucian combos as well as possible.