I'd need to practice my buffing sequence because I only get one chance to beat Malenia first try.
Not much chance I'd get it first try. But how awesome would it be if I did?
I love your enthusiasm, but beating Malenia on the first try is just something outside the realm of possibilities.
From there I'd have 20 seconds to switch to the fists, RKR and jump attack her. I'm hoping this would one shot her first phase, though a second or even third jump attack may be needed.
She has roughly 18k HP, you would need to deal 6k damage with each jump attack, while my guess is with that setup you would deal around 2k damage with each jump (and you'd need to reapply RKR every time).
The reason I'm going for the fists is because I saw a YT video where it explained that there's an interaction effect between dual weapons and determination, which I assume would also apply to RKR. I don't remember how it works, something to do with the two weapons doubling the buff or something. The dude in the vid had 80 STR and was using a heavy katar with raptor's black feathers, blue dancer and claw talisman, buffing with only Golden Vow and FGMS. It's been a while since I saw it, but he was getting somewhere in the region of 7k damage per jump attack.
As far as doing RKR before every attack, I already do that. I've been playing like that for a while now. My character hops around like a flea chopping enemies with his big sword then either follows up with R1 or double rolls away, RKRs again and does another jump. The problem with my plan is range. I'm used to a very long weapon. It's highly likely that unless I train a lot with the fists I just jump in front of Malenia and get one shot during my recovery. There's also the short window where all the buffs are active and the reliance on luck to not just get cut out of the air during that critical first jump. Or I may be misinformed about her AI and she may just butcher me during my initial buffing process.
It's not going to work but I'm going to try. I try to win every fight, even the grafted scion at the start with my club and loincloth. I've never even come close to winning that one. But amazing shit can happen when you do just try.
I always head straight for Margit at SL1 or 2 so I can die, rest at the grace and get access to Roundtable Hold to buy incantations and stuff. But I always try to win. I am not a skilled player, and this was a 1/1000 thing that I've never replicated, but one time I did win. Shirtless and SL2 with a Lordsworn's straight sword that can't have been more than +2. He aggrod on Roger and the jelly and I squared off into his back, stance breaking and critting him again and again while Roger poured on the damage. It was a triumph, and I got a ton of levels out of it.
Always try your best to win. No matter the actual odds.
Also, even when my brilliant plan fails and I have to retry and fight her, the Guts is putting out 3k to 3600 ish damage per buffed RKR jump, depending on the enemy. This is at +22 with 73 STR and without physick or consumable buffs, just Golden Vow and FGMS. If I can get to +25 and 80 STR before the fight and chomp a couple of consumables I'm confident I could beat her legitimately with enough attempts. But I don't want to beat her legitimately. I want to demolish her with munchkinism first try.