first is tryndameire because of his ult but you can still outsmrt him if your minnions is by your side to laep on them.second is fiora even though yo u can easily dodge her ult with counter she can still beat if you use counter before she so you should use counter about 1 sec after she ults.third is kha zix because kha zix can easily delte you with just 1 skill combo but if you ulted or stun him intime you cna still beat him

first zed yes zed mihgt be strong bat jax can kill him easly no qestions.second is xin zhao xin xhao is a bi tany and at damging a bit greatly but you can still dafeat him easily.3rd is master yi even if master yi's attack speed and crit makes him op jax can still counter him because of his counter and empower.fourth is katarina even katrina is very very strong champs she have no use if you stun him.last is panth even though jax cannot deafeat panth in laning but if you trinity tabi and ruined he is easy kill for you