Depends on what you looking for. Good spawn of high maturity of atrox? Was none. People had no place for silver missions.
I am currently doing the atrox silver mission, but not in a hurry to finish it.
In the past three weeks I have done 8k points of the 60k, but I go slow on this one.
Don't expect to finish this one this year.
I know of at least two decent spawns which have atrox only.
One is south east of Fort Ithaca, east of the big bulk.
This spawn mostly has atrox from guardian up to stalker.
Plenty of old alpha's and prowlers only stalkers are more rare, but I avoid them anyway.
Second spawn is east of Jurra Plateau, one level II teleport.
There you find a decent spawn same as south east of Fort Ithaca.
Benefit there is that there is a service station in the middle of the spawn.
However for both spawns can be filled with lower atrox.
I think the problem is not the spawns themselves, but the respawn setting Mindark is using.
Hunters at Boreas will have noticed that the respawns of kerberos seem to come in waves.
The times between those respawns at times go up to hours.
To the OP,
it would be smart of you to 'NOT' put in new creatures for about the next two years.
I believe there are plenty of creatures that are hardly hunted, change and relocate them if needed.
And by all means, work on those damn hit boxes. Too many creatures have become a 'pain in the behind' to hunt them. Sample, currently I do the Allophyl and Estophyl mission.
And I am getting very tired of having to reset my camera angels after each kill, because their hit boxes are somewhere up there on CP. Not to mention with many creatures it is now hard to target them manually from a decent distance. Same goes for dragging the hit boxes out of your next intended target.
Also it would be nice if you let the bigger creatures hit on the player a few more meters away from them.
I have had it plenty of times that bigger creatures, like maffoid, run in between me and the one I am shooting at. Triggering a waltz between my avatar and the current hunted target. Not to mention the shots that go into other creatures that are hitting the avatar.
I understand you need quantity, but we all know people toss away cheap stuff that doesn't work.
Quality still makes more money in the long run.
Just my 2 ehm maybe 4 pecs.