[Stormcrow]

If dust vortices and wraiths aren't going to be player-characters, don't bother figuring out what character-rules are needed to construct them. Just make a note of what they can do, then when the player-characters encounter them, have them do it! You want a Binding attack to include FP-loss? Then it does!

The only time you need to worry about finding rules to create monsters is when the players are building monsters to play themselves!