User blog comment:YourPrivateNightmare/A comprehensive guide on how to ARAM (Part 2)/@comment-3475363-20130511090629/@comment-9370016-20130511193250

Well TF is still worth mentioning as one of the strongest. Much like how you said on Rengar, you can pull an xPeke with a TF ult and go for the Nexus of the enemy. Also with TF ult you can safely execute yourself and not give a kill for the enemy team so he is basically the only champion with a "safe back".