I'd like to see this. Post a video if you have one.
Surely you played more than enough matches to notice Samson (the RT commander, I think his name is Samson from SP experience) cheating 
God-mode whirlwind is pretty self explanatory, he ignores any damage and can't be interrupted (well he has PI already anyway, so meh). As of God-mode potion I'm referring to his weird potion consumption (liquefied red lyrium?) animation where he also ignores any damages and gets full guard. His god-mode remains for a few seconds after the animation finishes (I think...) Samson also has that weird "Stomping the floor & I'm invincible" animation where he also gets god mode plus aoe knock down around him (his death animation I think?)
Speaking of RT, I recall in HB RT footsoldiers get that weird rampage ish buff thing... Wonder if that's really rampage, or just a fake one with the visuals... And like their boss foot soldiers get that weird "red lyrium hype" on death god mode animation, it's almost like a RT version of unyielding, except they are dead dead before it triggers... 
On the other hand, Venatori commander is proper legit beefy in HB though. She makes really quality barrier that doesn't decay and soaks up like 100k (some artistic exaggeration here) damage... Plus she can pop it back up after you depleted her barrier too.
But I'm fine with that though, she at least plays fair (although our SS doesn't
), unlike our Uncle Sam.