PixlBit

I figured this boss fight had more to do with skill. I've killed them each individually, but after one of them becomes super powered, it just takes one hit and I'm done. I have a few of the items you mentioned. It'll just take time and patience. 

Do you mean the two snipers on the ledges? What I did is I ran directly from the bonfire with the knight past the bridge, ran past the two giant knights and all the white gargoyles then up the ramp with my shield up. As for the snipers, I ran up to the building ledge and walked towards the sniper on the right and swung at him with a two-handed sword and he fell. So I ran the whole thing just attacking the sniper on the right. Good luck! 

Also I was using the ninja/shadow gear and Eagle Shield w/ Zeinhander, so I was super light and nimble!

Thanks @Micheal117. 
I cleared out Anor Londo except for the Final Bosses there. They are assholes! I'm using Zeinhander with light armor.  I think leveling up a bit might give me an edge here.  I really don't want to waste 20K souls for the Dark Root Gate key, so I might have to run up and down Anor Londo with the giants I guess. I cleared The painted world, one of my fav levels here. I wish we could all play together coop. Would be so cool! But I'm on PS3.

I use wordpress. What's wrong with it? It won't let you post? I hope you are saving locally to a document first and then copying and pasting into wordpress just to make sure. 

I got to Anor Londo with a LV 50 Warrior. Where is a good place to farm level? Are you playing on XBOX or PS3?

Fire Emblem - it brought more new people to the game.
DMC - It came out earlier in the year, but it was an awesome game. 

Ranged weapons all the way. Bow & Dagger, Pistols & Shotguns.

Yeah! He's a nasty mini boss half way through the level. There are many many other rats too.

I've watched a few lore videos on Youtube. As if the game wasn't tragic enough, exploring the back story the game gets even darker. Sen's fortress was pretty fun though. 

I think this game will be available on PS4 and free-to-play. I think? So there is  a chance.