Since Tordor wasn't completely focused on hitting Lisita by the attack, as evidenced by him still paying attention to the way Judgment lands,
but still knew that Lisita was behind him, most likely ready to attack at the moment, i'd say it'd be fair to let Tordor attack, but also give IN's character a slightly higher chance of avoiding being hit. Without a direct line of sight and his attention split, i'd imagine the strike wouldn't be perfectly timed.
Depending how quickly the giant recovered from his landing in order to shift to this new threat, Tordor would either aim for the back of his left thigh, or if he turned in time the right leg where the knights armored joints met.
but still knew that Lisita was behind him, most likely ready to attack at the moment, i'd say it'd be fair to let Tordor attack, but also give IN's character a slightly higher chance of avoiding being hit. Without a direct line of sight and his attention split, i'd imagine the strike wouldn't be perfectly timed.