Because of the nature of stalwarts and chaotic horde behaviour it's pretty difficult to give particularly useful advice for rooms like this.
The aumtlich seem to like splitting up into a northern and a southern group because of the way the stalwarts approach them.
In most of my attempts at this room the stalwarts died very quickly and even though I got very close to conquering the room a few times it's pretty difficult to take care of one of the two groups and not be in a hopeless position for the other one.
What finally helped me solve the room was one of the stalwarts surviving long enough to use as protection against flanking aumtlich so as to not have to give up that much ground and be in a better position for the second group.
Of course that formation pretty much just happened accidentally because we're talking about stalwarts and I am sure there are lots of other more elegent ways of doing it but I was pleasantly surprised that I actually got one of the stalwarts to actually be useful.
Here's a screenshot and a sequence of moves for how to get there because I realise that this sort of advice really isn't that helpful in rooms like this.
Screenshot:
Click here to view the secret text
×
List of moves from the entrance to get to there:
Click here to view the secret text
×Start at 37,18 facing W, then make the following moves: 4x NW, 3x W, SW, 3x W, NE, W, N
From there on the rest is still a chaotic aumtlich horde, but at least I can confirm that it's possible and the chaos from the stalwarts is no longer an issue.
[Last edited by Aquator at 04-21-2019 11:39 PM]