From being stuck at the Ruin Sentinels (what an awesome tune that plays during the fight though, and their slender figures are freaky as hell) I ended up destroying the Lost Sinner with some help of Lucatiel and pwned some incredibly easy skeleton dudes boss at Huntsman Copse. Then I went back to unlock Belfry Luna and it was invasion fest. Helped someone kill the gargoyles but I can't kill them in my own world, ugh.
Also, does anyone know where the Bastille key is? I can't seem to find it anywhere and it's driving me mad...
Co-op is much more awesome here, especially with the shades you can summon to help you clear some areas of enemies very quickly so I can then proceed to explore. I keep dying a lot regardless and forced to use the small soapstone myself. Gotta conserve the human effigies for NG+ after I read about their secondary effects if you burn them.