Buburimu subjob isn't necessarily easier. For one, the Damhels have a ridiculous amount of HP, even if they do drop the item you need fairly frequently. Makes for a long fight and they will hit HARD on anyone whos about the lvl they need their sub items. Also, you need to kill a bogy for an item that is a semi-rare. That means you need a lvl40ish escort, or a good team of 30s, to get the thing AND it won't always drop. Valkurm may be a pain, but better to go there and meet all the people who will make or break your stay in the game, it's the first place all nations get on the same map... Buburimu tends to be, well, deserted. As for the skull... any ghoul can drop it. If you know someone in the 30-35 range ask them to toast a few ghouls for you in Gusgen, they'll be able to solo them easily. Plenty mobs to pick from there and not many opt for this alternative so there'll be much less competition.