Let's focus on teleporting. Where can that article be found? (I don't have a subscription, so I hope it is not behind that wall)
There was a maxi-teleport Warlock on the Wizards charop lists, but I can't seem to find it now. It's fairly easy to do now though, given that Eladrin are finally more viable Feylocks. Just remember that you don't want to stick to only Feylock powers, as other Pacts get teleports too; notably the Starlock.
As an Eladrin, you have the racial Fey Step power (teleport 5). As a Warlock you get a free teleport 3, via the Misty Step Pact Boon (Fey Pact), whenever one of your Cursed foes drops to zero hp. That's a good amount to teleporting right there, but only one of them is controlled. So, as they come up you add:
Level 2 Utility - Ethereal Stride (teleport 3 + defense bonuses)
Level 3 Encounter - Otherwind Stride (teleport 5+INT and burst 1 attack)
Level 6 Utility - Fey Switch (swap with ally, teleport 10)
Level 10 Utility - Ethereal Sidestep (teleport 1 at will, as move)
...or...
Level 10 Utility - Warlock's Leap (teleport 6 without line of sight)
Level 16 Utility - Warp Space (burst 5, teleport self and 2 allies)
Level 22 Utility - Ascention of the Elder (teleport 20 up, fly 8)
Level 23 Encounter - Dark Transport (range 10, swap places with creature + damage)
There are others, but those are what I would recommend. The 10th level choice depends on whether you really want to be the infinite teleporter, or if you want to be able to get to places that no one really should.
A couple of key magic items are the Eladrin Boots and the Eladrin Ring of Passage. Each will add 2 to the distance that an Eladrin can teleport himself, plus have a Daily teleport power. Eladrin Armor could add another square of distance, but it likely isn't worth what you would have to give up, in stats and feats, to get it.
So by 10th you could possibly be able to teleport 5 squares, as a move action every round, or through 9 squares of solid rock.
Then there are the feats, that let you modify how you can use your racial teleport power. The most useful would be Fey Step Trailblazer, which allows you to drag an ally along on your Fey Step.
If you want to teleport enemies then taking a Pact Sword will let you teleport an enemy, on a hit, once per day.