Almost had it at my first try but I took more +319 damage than the limit (30000) to get an S rank...
Honestly this mission sucks, being in DT all the time might actually be a downside than an upside, thank god I am playing in Very Hard and not in DMD because if I was I wouldn't even notice I took damage until I finished the mission, which takes a long time to do so.
Nonetheless, this mission is bad in my opinion, you have to practically rush 70% of the mission just so you can stay alive.
I wouldn't even consider it bad if didn't just decide to spam a ton of Prides and Lusts, including a Hell Vanguard, right at the end. After that Geryon is relatively easy IF you know how to loop him... which I don't. Yet.
I could have got it on my first try but this one was better, since I took less than 10000 damage, which is half of the max health if I'm correct.
Nothing more to add...
Moving on...