Radagon/Elden Beast advice needed

[Panzer Grenadier]

I'm currently a Samurai bleed build, the bulk of my stats are in Dex and Arcane, but the game pulled the rug out from under me by making a bleed build useless against these two bosses, some of the guides i've read suggest either the Blasphemous Blade or the Sword of Night and Flame, i have these weapons but i don't have the stats to use them (my int is 9 and faith is 10), should i respec to be able to use them?, another guide suggests Nagakiba with an Occult ash of war, what is an Occult ash of war, is it a specific one and if so which one is it?

[kenneth]

i used rivers of blood and the katana of poison and well he can't bleed and get poisoned too, i just learned his attacks and having a mimic can help you but for elden beast there is a high % chance that at 25% healthn the mimic will die, i got 40 arc and 50 dex with light load to get better dodging, LHUTEL THE HEADLESS is a good summon too

[MULTIPASS]

Radagon is vulnerable to strike weapons (hammers, etc) and fire damage. If you're going to keep your current stats as dex/arcane, your best bet is some kind of hammer or flail with occult affinity (or keen, if that ends up with more damage based on your current stats). I would not recommend the nagakiba, since Radagon will take significantly less damage from a slash weapon.

Occult is an affinity bestowed by ashes of war which makes the weapon damage scale primarily with your arcane stat. There are a handful of ashes with native occult affinity, but you can use occult scaling with any standard/heavy/keen/quality ashes if you have the black whetblade from Nokron. I would recommend that, since the native occult ashes are underwhelming.

[Sabaithal]

Fire damage is probably your best bet to both bosses. Though Elden Beast has no special weakness, fire is as good as magic or lightning against it.

As already specified, neither boss is susceptible to bleed. I would choose a different approach, say, since you already invested ARC, dragon communion incantations. They can be quite powerful with the dragon communion seal.

[Flo]

It doesn't really matter if bleed doesn't work, that just means you have to play the game normally without health bars being half their size

Stack on holy resist (Haligdrake and Pearldrake talismans, maybe even armor), and simply learn to doge their attacks I guess. Radagon is the only really hard one. He is annoying but has really easy and obvious opening, like after his triple slam, or his jump attack. If you're having trouble avoiding his basic attacks, you can always keep your distance and wait for those.
Elden Beast is pretty passive and slow. Just run around when he does the falling lasers attack, when he does the ring attack jump over it and run out of the circle. When he does elden stars, run around but pay more attention to his other attacks than the stars, you can't really avoid them.

[Panzer Grenadier]

Hey guys thanks for all the advice, i ended up going for a simple Great Pickaxe +25 with fire skill on it for Radagon and i went with a Godskin Peeler +25 with Black Flame Tornado but set to standard for all physical damage for the Elden Beast, i still used Black Knife Tiche (he worked the best overall) and i got them both on my first try today.

[Zoid13]

meh i still had bleed / frost on my raptor talons when i did them. honestly didn't notice much of a difference. killed on 3rd attempt.