Enemies Teleporting short ranges

[zgrssd]

With psionics, teleportation as attack is a thing (Skip, Chaos Skip, Mass Chaos skip). But actually giving those to enemies could be really frustrating. There is not any active counterplay option to a Mass Chaos Skip I can think about.
And Control Effects like Becon or Berserk a never for to use on players. (Stun might work, if it is short enough).
Some of the most interesting player tools in PvE, are the most frustrating things if used against the player.

But what if there was a kind of enemy that could self-teleport?
* A short range teleport could allow closing the distance into melee, or getting into good cover/unexpected flanking positions
* it could also get them out of grenade explosions
* Finally, if it could go beyond line of sight obstacles, you could make a enemy that ignores walls.

For the last point: There already is the sapper pathfinding, wich tries to avoid defenses but largely ignores walls. For sappers they are ignored, because they will just punch through those walls. But teleporters could ignore them, because they would "skip over" the walls.

This should only be used for a limited amount of enemies, that should be visially distinct.
Maybe a special form of Insect, like a Brain Bug or Psionic Overmind?
It should not be combineable with some defense options, like Shield belts. Maybe it even could be/require a belt-slot item?