They are game-breakers but could easily be tweaked. Make hacker only last for 3 seconds literally to just stun the enemy's AA. For teleport, just decrease the length to about 8 feet, then make the user take some time to bring up their weapons and throw grenades. Fixed. Oh and teleport would slow gameplay down a lot and if you were in a battle with an enemy in Infinity slayer and one of their team mates strolls by, they have the chance to kill you easily. Make the teleporting be very fast to land but a decent length.
[Edited on 12.22.2012 10:08 PM PST]