Just a strange tactic I thought up for the warlock in our party, but I'm not sure it would work. This trick is probably not too powerful in a by the book campaign, but in our recent, low combat, games which average about one fight a session with the rest of the time being spent infiltrating, politicking, and investigating it has the possibility of being quite powerful.
A warlock has the encounter power otherwind stride, the feat sacrifice to Caiphon and no adjacent creatures. Otherwind stride has the target line Target: Each creature in burst. The warlock uses otherwind stride, making no attacks because there are no adjacent enemies and teleports. Having just used an encounter power with targets and not hit any of them (0 for 0) they can loses 3 hp and recover otherwind stride. Effectively, they trade hp for movement.
A warlock has the encounter power otherwind stride, the feat sacrifice to Caiphon and no adjacent creatures. Otherwind stride has the target line Target: Each creature in burst. The warlock uses otherwind stride, making no attacks because there are no adjacent enemies and teleports. Having just used an encounter power with targets and not hit any of them (0 for 0) they can loses 3 hp and recover otherwind stride. Effectively, they trade hp for movement.