Try using your stun or knockback in response when you see ravage castbar or gore animation? (note: you cannot use interrupt cause ravage is uninterruptible, use the other tricks) Not sure what the sage one is called but inquisitor stun is electrocute.
And yes, Marauders do hit that hard if you let them. The fun part is not letting them.
The gore animation looks like stab with both sabers simultaneously. Its your cue to get the hell outta there.
In our guilds pre-christmas party I lost couple duels to a sorcerer as my marauder, Im sure you can do it too.