Atlach-Nacha: free nets? If you can't find over 9,000 ways to both use and abuse that, you're not trying. Unfortunately, the Spider climb is very short-lived (should just be constant, I mean slippers of spider-climb are cheap for a reason, and would fit with other constant vestige abilities). Monstrous Spiders of that size and swarms aren't that great. Other than the Nets, lackluster.
Ithaqua: Nothing here is amazing, but it is all at least somewhat useful. Sleet storm is great to lay down to make an escape, if nothing else (balance means difficult terrain, they can't see, etc.), it being bound to you ("surround yourself") makes it worse, but still useful. Cold subtype: several very well know bonuses to that, seeing as how cold-casting is one of the best known ways to bump save-DC's, to say nothing of Shivering Touch and benefiting from Algid Enhancement. Grasp lowers Dex, combine with netting and other Dex-pens, and it makes it much easier to deal with people in many ways (again, use imagination for utility, *hehe*). Windwalker can be amazingly useful too, as it make you essentially immune to your sleet storm's balance need, and grease, and marbles, and pressure-plate traps, and most trip-traps, and you can levitate (slowly).
Shudde: same opinion as Delver Greaves. This would be better than the greaves for its purpose, but you're more likely to have extra meld-slots than vestige, and between the fact that we won't be combat heavy, nor is this wnough better than the greaves, I'd say skip it.
Y’Golonac: If you dump Cha and do not show the sign, skip it, there'll be others in the party who can charm, and really well at that. If only one of the two is the case, then
. If you have good Cha and you show the sign
.
If you have good Cha and you show the sign and you
don't bind this guy
Heck, for this game, I doubt anyone would even notice if you allowed the influence.
Basatan: Sidestep 5ft instead of AoO? This is a free feat, and a good one at that. Charge that gets to be zig-zaggy as you want and you get a +4 at the end? This guy is melee gold. Two primary natural attacks with the claws?
The others just seem to suck IMO. Not even worth bringing up.