Tanks don't need to be patched. You don't need a new weapon to fight them.
The best way to defeat a tank is... with another tank.
The best way to defeat someone in a tank with a clue, (if your first option fails, because of your lack of badassery) is with two tanks.
The best way to defeat two tanks, is with three tanks. And so on. You get the picture.
And your solution for someone who isn't level 70 yet?
Nevermind. I'm sure your solution will be to "find new session".
Which is crap, but whatever.