This supposed to be difficult? Hologram Tempest Mephis 6 (No Hit, Mobile)

Wassup y'all. As I said in the video, I'll be ranking every Hologram 6 boss based on my experience here. Please consider I'm NOT taking on account the time I spent just to kill em, but to kill em with a NO HIT RUN. And, as y'all seen, my runs ain't some regular shi, I prioritize art, so it makes it waaaay harder. I could do like most people on youtube and play safe, but I like aggressiveness. Anyways, here's the ranking, from EASIEST to HARDEST:
1 (easiest) - Tempest Mephis (aka Mad Casper) 6. No, I'm not jokin. Reason why: he got lots of parry windows, and I'm a parry lover, so I'm really good at em. He also not so fast, so it's easy to see what he's doing. Only difficulty in here is his clone, and not cuz its one more enemy, but cuz if I parry him I can't dodge or swap characters for some time. I spent no more than 3 hours trying him for this run, considering the tries I did when I still wasn't strong enough to kill him. If we only consider the tries I did while I was able to kill it, took me around 40 minutes.
2 - Impermanence Heron (aka Big Chicken). Most part of the difficulty was in gettin the timing right for his explosive feathers. Not a hard boss. Overall it's easier than Mephis, but a no hit run could take some time. Estimated time to beat him no-hit: 5 hours (total, i.e., also counting the time I wasn't really trying but resting)
3 - Mourning Aix (aka Big Mosquito). This one was my nemesis for some time ngl. I'm way too aggressive, so his roaming feathers kinda bugged out a lot and I wasn't understanding how to dodge em properly, until I noticed I could go away for a couple seconds and dodge em easily. Estimated time to beat him no-hit: 15 hours (total)
4 - Feilian Beringal (aka Big Monke). His monkey summons kept hittin me for a long time, and since my ping is kinda high and they crazy fast, I was eatin them hits. Beyblade attack is also weird to dodge, and I took some hits in there. Estimated time to beat him no-hit: 1 day and a half (total)
5 (hardest) - Crownless (aka Wannabe King). This one took me around 3 days istg. He's way too fast, way too unpredictable, and also a small boss (which means it's harder to see what he's doing under lots of skill particles). Second phase is way easier than first one, but I got lots of hits during i-frames and had to figure out a technique to get through that risk, and that's why I implemented delayed-counters during the run.
TL;DR: Easiest to hardest (in my perspective and experience) on no-hit runs: Mephis, Heron, Aix, Beringal, Crownless. Easiest took me 40 minutes worth of tries, Crownless took me 3 days.