Well, if you look at it from numbers perspective. You will already have some morale, perhaps even M1. Marauders have a 10s (lasts 5s) cd on their ability, so you can't spam it. It is a problem if multiple maras rotate it of course, or if you have chop fasta (which we almost never have anymore). So there is a chance you will get some morale again, that's why I said it's a slight edge. And that's also why I asked if you are using flashbangs and if they're any good. If you manage to interrupt most of the damage, you might get to M2.
Thus all theorycrafting, and would really have to be put to a test.
Edit: I was looking at only one ability of marauder, my bad, I'm not an expert
The 25% chance to drain morale tactic is what hurts you. I'm actually not well informed on what tree our maras use, but I'm sure it's this one. It changes my point for quite a bit. Fighting against that kind of morale drain is simply too hard yes. Unless you have your elven friends with you that can help you get some morale back, it's almost certainly pointless to hope for morales. But, it doesn't mean that every mara is specced like this, at least the random people in the zone. Maybe one day you could consider to ignore the grudges of the elfs, and let them join your ranks