I used this a year ago:
I go with my main character--PR lvl62 and my spoiler--lvl40 (didnt do second quest)
My archer full equiped (top B, can also use top C)
My spoiler Composite Armor +4, helmet +3, gloves +3, and a War Axe (But I don't use SS)
I go Catacombs Branded without being in party with my PR. (I guess it was without party, don't know anymore)
I setup a bot, and my spoiler as leader. He spoils "Gigant Confessor" and "Lith Shaman" (both spoil 1/6)
My spoiler doenst hit him hard, so he won't get a lot of expierence, (Plus, I guess I wasnt in party)but he can use sweeper to get SOP.
* GET enough potions, for both characters, and leave it over night
Next day you have around 150 to 200 SOP. (and lots of CBP, 300+-)
I solled sop for 80k each. and CBP for around 25 to 30k each