Ghostrunner

Use the Blue upgrade for Tempest which refunds your focus when you kill 2 enemies, it's called Tempest: Multikill Refund, after the 2 enemies are killed switch to blink and take one more enemy out. The best level I found to do this achievement and many other achievements on was Level 15, you get to a point where 10 of those crawling enemies attack you, jump past and get the shooting stars, build up your focus and get the achievements, when restart the checkpoint, you can get the 4 achievements where you get 3 kills with each special ability

As soon as you've unlocked your second ability, you can get this achievement trivially. Any time you reach a checkpoint with your power fully charged, kill the next enemy you see with Blink (as far as I know, Blink requires an enemy to trigger). Then pause the game and select "Restart from checkpoint." This will immediately respawn you with your powers charged, as it returns you to whatever state you were in at the last checkpoint. Since Tempest doesn't require an enemy present, you can just trigger it as soon as you spawn and be done.

If you need a specific spot, it's possible on the very first enemy in the game (after you've gone far enough to unlock Tempest). Level select "An Awakening," then sit there long enough for your power to charge. Get to that first enemy, kill him with Blink, reset to checkpoint, trigger Tempest. Bleep bloop.