Belt Kingdom: mid tier I say. If you can keep them disrupted, they're fairly harmless. They're a Gowen snowball in every sense of the word.
Shrine Knights: I say high tier if you use pom first SS and opal carbuncle along with Rasam SSs and Aliria. Normally, Falkow would rock them, but now that they have enough options to put up a fight (SK2->SK1->SK5), it just may be time for them to make a comeback.
WK: I wouldn't say high tier. Definitely not high tier. They're too frail and their damage is too low. Their only claim to anything good is that they can trigger violet SS somewhat reliably and Volfied you into the abyss if you're going heavy on characters.
Dolls: Mid tier at best now thanks to the MD augment nerf.
Urgrant/CFA: definitely not high tier IMO. A level 3 rush will overwhelm it pretty quickly and Lawtia just has Urgrant's number, no two ways about it. Now that you can no longer build up an SP advantage with CFA (that is, play one, play another, get 6 SP back+2 the next turn, snowball that while sacrificing LP into an extra deathmaker), it's a very, very hit or miss file.
Emana/Mystere: I have no idea how Emki gets this to work, but he doesn't seem to play much. Wonder why.
Big Red: Phoenix chick=GG, end of story. TJC also.
Sea serps: solid mid, possibly high depending on how you SS it.
Big ref: mid tier. Once again, hit or miss. Mid refess and buncles absolutely crush it thanks to heavy defense.
Marduk: not quite sure. Could definitely be high tier (marduk+miffles+TR+bastandora+diondora+Aria+Rubens+Aano+Renally), if you're willing to spend half an hour per game. I think the only reason this wouldn't be high tier is that who in their right mind would have the patience to play this file consistently?
Gowen Rush: mid-high. Kurina+tiger are getting obsolete, though.