Hey, I have tried 20/40/60/100 and it works perfectly fine. In missions without Chosen a Ruler can appear and still the Chosen fell a lot more determined and relentless.
I can only reiterate that this mod is absolutely great!

Yes, that is probably it. Like it says, you could get multiple appearances back-to-back (or not). It is working properly for me.

yes i change the percent to 0 and the chosen didn't appear
I changed it see if the mod was bugged or if i was just unlucky (I did this between posting my initial comment and you responding)
since no chosen showed up i'm now leaning more to me having horrible luck then the mod actually being broken

OK, I'm confused by what you wrote. You said that, after setting percent change to 0 , the chosen did not appear?

about 3 (not counting a chosen assult cos in that case it would be 4)
i might be just my shitty luck i changed the apear chance for the first mission after faceing a chosen to 0 (to test if the mod was broken and they where indead spawing every mission) and a chosen didn't apeare for said first mission

How many missions in a row have they appeared?

i swear chosen are apearing every mission
is it just my shitty luck or is the mod bugged?

At first I just thought I had bad luck but after a while I noticed that even after the appearence of Sectopods and Gatekeepers hadn`t encountered any Rulers after the story mission that introduced them. Well, this made sense because Chosen are prioritised over Rulers and indeed the Rulers showed up immedeately after the Chosen were dead.

As I said I will try again with 20/40/60/100 and if this doesn`t work I will change it to 0/33/66/100 so that Chosen do not spawn the next mission after I have defeated them in battle and hope that this opportunity will be enough to give the Rulers chance to challenge XCOM.

I will report back how things turned out but this may take a while. I won`t be able to play for at least five weeks starting next tuesday...

First of all please let me repeat that this mod was a definitive boon for my campaign and I will keep using it! Thanks again for making it!

Normally I don`t integrate the DLC missions but play them as before the Integration was possible (Viper Nest mission etc.). This was also the case in my last campaign, which I only started after I had this mod installed (and fiddled with the percentages).

It should be noted that Rulers will take a while to appear if you selected "Integrated Downloadable Content" at the start of a campaign. But for the Chosen to appear every mission, I am not sure what you did to make that happen. If you made changes mid-campaign, that might be the cause. Maybe a new campaign will have the effect that you intended.

Okay, after my first campaign with this mod I can report that I think I have screwed it up somehow...

I altered the chance of appearence to 25/50/75/100 for every difficulty level. The result was that a Chosen spawned every(!) mission until I killed them. Side effect was that the Rulers appered only after the (first) Chosen were killed (and then obiously only in this specific territory without any Chosen alive).

Now I will try again with 20/40/60/100 in the hopes that there are missions without Chosen so that I may encounter the Rulers even when the Chosen are still alive.

You, sir, are a scholar and a gentleman!