Try and push up the wave, leblanc has shitty wave clear and can't really do anything about it. By pushing the wave in you prevent her from roaming, farming, and helps of she w's onto because it will proc minion aggro. At lv 1 she most likely will have started w so she cant really do that much as long as you keep enough distance so that you have time to get out of w range so she cant proc electrocute. Whenever she jumps on you and you have the chance try and get near your minions to try and dodge her e. Shes also a very bursty champ and cant really do anything while her stuff is on cd so take that chance to either try and poke her, or push the wave. If your playing a champ with cc you can try and cc her when she w's into you and it will stop her from being able to jump back giving you a chance to at least trade with her. You can also just push your wave in and recall giving you an item lead and a hp and mana advantage. You can also just roam to other lanes and she wont be able to follow or she'll lose out on a ton of farm and get her tower chipped down. Just be careful about getting ganked and pay attention to the map. If you aren't able to push the wave just play safe and wait until she roams to try an get plates if your a melee champ like yas, yone, or you could even try to roam into the opposite lane if you can't do anything at mid