Akali 2XKO combo: 556 damage, hard, by Lovecore. Depending on the hits for jm you can get slightly more or slightly less damage
2m > m > h(2) > 3h > 9[h] > 9h > 92h > m > 9l > jh > j2h > 2m > m > h > 2h > jm(2) > jh > jm > 9 > jm > jh > js2 > 66 > 3m > s2 > s2+m
Depending on the hits for jm you can get slightly more or slightly less damage