Undead Burg is capable of being skipped.
Kill the Capra Demon and unlock the sewers.
Leave the sewers alone, it's a good farming and PvP spot.
Kill the Gargoyles, and Qualag.
Leave the forest untouched.
Beat Smough and Ornstein, then kill the Princess to make Anor Londo dark.
Don't kill the second boss.
Kill all 4 lord bosses, and unlock the Kiln.
You now have the following area's to PvP.
Undead Burg
Darkroot Garden
The Sewers
Alvina's Forest
Anor Londo
Ariamas
The Kiln
Notable arena's you'll loose are Blighttown.
I doubt this is new info, but this is what I do on NG+ usually.
Kill the Capra Demon and unlock the sewers.
Leave the sewers alone, it's a good farming and PvP spot.
Kill the Gargoyles, and Qualag.
Leave the forest untouched.
Beat Smough and Ornstein, then kill the Princess to make Anor Londo dark.
Don't kill the second boss.
Kill all 4 lord bosses, and unlock the Kiln.
You now have the following area's to PvP.
Undead Burg
Darkroot Garden
The Sewers
Alvina's Forest
Anor Londo
Ariamas
The Kiln
Notable arena's you'll loose are Blighttown.
I doubt this is new info, but this is what I do on NG+ usually.