[mivayan]

I noticed the theory that trampling is a handy rock-scissors-paper style counter to F9W9 helhirdings. So I made a test.

Side one: F9W9 bless.
One holy3 priest, to cast divine blessing and smite. I wont count his cost. 40 helhirdings: 3000 gold, 480 resources.

Side two: F9W9 bless which doesn't matter
One holy3 priest, casting smite for symmetry's sake. I wont count his cost. 100 EA ctis lizard chariots: 5000 gold, 2600 resources.

No commanders were harmed in this test.
Fight one: chariots defend, 29 out of 40 helhirdings die, 95 out of 100 Lizard chariots die.
Fight two: chariots defend, 16 out of 40 helhirdings die, 98 out of 100 Lizard chariots die.
Fight three: chariots defend, 14 out of 40 helhirdings die, 88 out of 100 Lizard chariots die.
Fight four: chariots defend, 5 out of 40 helhirdings die, 75 out of 100 Lizard chariots die.
Fight five: chariots defend, 39 out of 40 helhirdings die, 54 out of 100 Lizard chariots die.
In this last fight, 2925 gold were lost for helhirdings. 2700 gold lost for chariots.

So, for only 167% of the cost and 5400% of the recources, you might once in a while destroy a F9W9 helhirding army with lizard chariots. Not worth calling a counter.