Yeah, the problem I ran into was that across three charges with warbeasts that all moved at least 14" he managed to "one-shot" the colossal even with failsafe on it. He rolled at least 2 16+ damage rolls, and with Chill failsafe ARM bonus wasn't even there. And then with feat, he pulled back where I couldn't get close enough. I was exactly 14" from one beast, and tagged it twice with the big guns on turn one, but it was dead turn two.
The three were a Ravagore, a Scythean and Typhon. All of them appear to have enormous charge ranges with Leash, and dual Slipstream.