Wow, the Four Kings fight is absolutely brutal. That was the biggest adrenaline rush I've gotten from a game, including my first PvP encounters. My hands were shaking so much I could hardy play

I'm going to go get that Kindling flame so I can get that 20 estus, though running out isn't my problem so much as getting beat down while I try to recover. I'm also going to upgrade a weapon to +5 Chaos if I can manage it and finish my pyro flame. I believe it only needs one more ascended upgrade.
Which weapon should I upgrade? I have a +5 Raw Reinforced Club (picked it up as +1 Raw from a Gravelord), a +4 Lightning, +10 normal and three +5 normal. I'm planning on getting a set of +5 clubs in each upgrade tree, other than magic. I was thinking a +5 Chaos Battle Axe, since speed is the key in this fight.
Turbo and DG, I expect you both to reply to this.
Edit: Ah, there you are

I honestly think Pyro is easier. Almost all the enemies can be exploited by their slow moveset and long tells. The only problem I've had compared to my knight this far are Darkwraith enemies with their combos that are impossible to get out of once you're caught , and the Four Kings. I've learned how to deal with Darkwraiths so now the only problem with them is patience.
I haven't used Iron Flesh but a few times; will it sustain all the Kings' attacks unblocked?