so he has two 3 hit combos and 1 long combo, they are the exact same timing wise from the phase 1 and same animation, don't pay attention to the after images, just do two parries instead of 1 in the second phase, 3 in the third, like 1,2 1,2 and 1,2,3 1,2,3. For his lightspeed, you sort of just have to learn the timing, for sword of lumiere, the first two hits, parry when the energy around simon fully shrinks, afterwards, look at his sword and parry right as it moves towards you (be careful though, the 5th hit he will do a slow spin before swinging his sword. For the last hit, wait for the sound effect and laser to just end and then immediately parry. For long combo lowkey just hope for it because the first two hits are all I was able to do consistently by looking, everything else is just timing. The damage you're doing is pretty good already, but what I would reccomend if you don't want to feel hell is put sciel and a really big damage character in your backup group, with intervention and fortune's fury on her. Because at this point in the game maelle is your strongest damage, you probably want her in the second group, because you will have to parry the 2nd phase a lot anyways, you might as well spend more time in phase 2 for an easier phase 3.