Assuming you don't wanna go to rock lobs, and want to range+cannon, try Wallasalki, in waterbirth, the room with 5 in it is multi. I know you wanted fastest crims, but overall this is decent "charm exp", range and profit per hour. Blues were erratic for me I was gettin 20-45 an hour, crims grns and golds are roughly 30 per hour. But I was using melee with cannon. Pray mage and do not let it run out, death comes fast, so you may wanna have a door partner on stand by.