I saw some vids on Skyrim gameplay and... I did not find it enjoyable. At least, not as much as dying while playing Dark Souls... maybe when I stop playing DkS, I can see Skyrim in a different way...
... and just killed Priscilla in DkS, but did not get the goddamned dagger from her tail. Hit her with a lot of stuff on various attempts (lightning spear +5, Quelaag Furysword with a lot of humanities, Great combustions) and she did not become visible... until I killed her.
At least I have something as a must get on NG+...
DUDE!! What SL are you? I've got three different characters on that game (well, two I can probably coop with. The third is a character I glitched to 711 to test damage caps).
With Priscilla, I find that the (relatively) easier way to get a bead on her is to cast Poison Mist at the beginning of the fight; the damage isn't much but it should allow you to at least be able to tell where she is. Cutting off her tail, like with Seath, is significantly easier when you've got a partner to do it with though.
As for Seath himself, there are a couple of tricks that make it easier:
- When the fight starts, run towards the crystal, and wait for him. He'll lumber slooooooooowly towards you. The SECOND you see him move to attack, haul ass around him towards his tail: he'll strike the crystal himself and get stunned for a brief but relatively good while, which should be enough for you to whack his tail (make sure you hit the tip of the tail and not the base). According to some Gamefaqs people, two shots of Great Combustion with a fully ascended Pyromancy Flame should suffice.
-Equip the Slumbering Dragoncrest ring. Apparently, Seath is kinda blind, so if you do that, he won't use the most devastating attacks in his repertoire. If you stick to a medium distance of him, he'll always resort to the crystal laser sweep move, which should give you enough time to move around to his backside (depending on equip load anyway). Be careful though, because until you cut off his tail, he will still occasionally use his tail thrashing attack.
Cutting off Seath's tail was a pain in NG, but not so much in NG+ (on two different characters that is). Now, NG+ Four Kings solo... yeah. I couldn't find anyone to summon, and given that the character I was using had been Covenant-hopping to get goodies, I had sinned like a motherfucker, so the Darkmoon Blades were on my ass like kids on crystal meth-laced candy. I ended up having to solo them without even the aid of Phantom Beatrice to avoid the hassle of extra HP. Thankfully, being a specialist Sunlight Warrior at 50 Faith with all the Spear miracles made the fight significantly easier. I just unloaded spell after spell, then Iron Flesh'd up and whacked away the rest. Managed to kill one king at a time before they had the chance to gang up - after that, death would have been pretty instantaneous.
EDIT: As far as the special boss soul weapons... Well, many of them are not that worthwhile. There are a few notable exceptions (Tin Darkmoon Catalyst for Faith-based characters, Quelaag's Furysword for easy to upgrade fire damage with a decent moveset, Crystal Ring Shield pre-patch was pretty beastly, Greatsword of Artorias for awesome scaling - plus the cursed version for the New Londo ghosts), but overall you'd have to know what you're looking for to get a decent investment out of them. As a rule, I've observed that even the best STR-based weapons simply don't scale that well in damage and you do end up having to rely on weapon buffs to get something out of them (again, there are exceptions, though I dislike their movesets. The Zweihander is a good example, as its strong attack knocks enemies flat but is also slow as all hell. On the other hand, the Black Knight weapons all deal very decent, pure physical damage, but cannot be enchanted). DEX-based weapons scale more quickly but at poorer return rates the higher you go, to make up for significantly faster attacks. INT-based weapons tend to kinda fall into the gimmicky area, except the Moonlight Greatsword - that weapon is REALLY boss. Faith-based weapons scale decently, but some enemies resist it more than others (at least the occult variety seems to be more commonly resisted, though I haven't tested it extensively).