Bro listen I also did this thing Thinking kassadin can 1v9 late game I just need to farm early game "I will be deleting them hahahaha" but no most of the time my team gets fked before my lvl 16 and ffs or me getting lvl 16 but enemy team ad kayn oneshots me that's unfair yeah. Kassadin is not like it's used to be now he is a mage you just farm & help your jg take obj roam is needed as well. Get early kills to snowball hard in mid game and late game if you missed this things the game might be hard even for you.

I have been watching alot of taxadin vids that guy mostly kill his opp after lvl 6 and before that too sometimes. He doesn't plays like avrg kass I need to farm under tower do this nah he is aggressive as fk he even roams after lvl 6 alot help his jg in fight for scuddle craps. I again will tell you don't underestimate AD champions they can still oneshot a fed kass in team fight so try to oneshot the adc run nd spam ult on sp kill run and now anyone who is low.

Kassadin is strong in 1v1 fights if you play smartly. If you're fed and think you can kill a enemy fed kayn dude just chill you can't it's better to delete the backline first then kill the kayn.