[Snowball]

to answer your questions. the last items you need, the bloody robe is dropped by bogys in valkurm dunes as well as buburima. they are plentiful on the beaches. can you solo those? well you should be able to but i couldnt guarantee it. it seems like i probaly have at lower level whm but not 100% positive.

now as far as the magicked skull and ghouls. they are found in valkurm dunes in most areas. the drop rate is fairly high, but to actually find them to kill you need a ranger and widescan. they only are seen from 20:00 to 4:00. they can be found in great numbers in gusgen mines, but drop rate is low.

i have seen skulls drop after 1 kill and take up to an hour or longer. due to sheer number gusgen is your best bet. just watch your hp closely if it falls to low you will blood agro other ghouls and the wolf type mobs there as well.

Okay, so I'm either going to try Gusgen, or Valkurm at best.

Regarding the times for them to show in Valkurm, I read about that on alla.
Someone said that they show somewhere between 20:00 to 4:00, (or in their words, 0-4) but something else which was posted by this person.......
it was also said that they (the ghouls) can spawn around J-8.
I can try looking around this area, but I'm not really sure if everyone hre can confirm this or not.

Regarding Widescan.
I had assumed it was posibly an ability or trait used only by RNG, cause I looked through my FFXl guide under RNG where it lists all hte Job's abilities and traits to see if Widescan was listed, but I couldn't see it.

So I'm quite unsure what widescan is, and what it does.
Maybe it's a bit confusing for me.