Currently the tank is literally Xeno Satan sent by Queen Mother to spank all the bad children who don't capture.
Currently mini-flamer is pure death and allows you too kill any who dares fight you. Current issue is the big aoe of the flamer makes it so only rav and queen can fight it reliably without dying. The queen fighting this is liable for her dying to mini, rav to just getting ran over. Sure try to hit it diagonally but that is dam hard to do constantly and not get blocked by some other xeno or mess up and die.
Most others are based on having flamer to cook aliens, nades to stun aliens to death, or flak for that sweet unstunnable sniper.
LTB-TOW can hurt... alot, but it an arty piece meaning it needs to be in the right spot and even then it is not guaranteed to kill a queen. It's biggest issue is if alone it can be overran and killed.
My biggest question is how to counter mini-flamer tank?