A few suggestions:

1. When the AI unlocks one of the special Ascension Buildings, don't give them the technology. Give them the Building. I have seen computer players waste one hundred years on researching the dang thing. I am not kidding.

2. As a Spiritualist, when you use Minor Artificats to Discover a Religious Revelation, that should give you the Spiritualist Ascension Building.

That would work for single player. However, in multiplayer there are effects felt by the whole galaxy even after your empire ascends. For example, the authoritarian ascension has the ruling class leave behind all of the workers and slaves, resulting in an empire populated by egalitarians in its place.

If you want to have Ascension trigger a Victory Condition, have it simply "Kill off" all other Empires the idea: Rather than Killing them it represents them not being Present into the Realm you've Ascended to.

Uploaded a Mod that merges this with Honor Leaders and adapts it for ST:NH: https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2290619979

2.8 is out, so will be updating soon for the version number. I may also make a future update with some improvements based on new modding features in the patch notes. I will also have a mod out soon that combines this with Honor Leaders - New Mechanic specifically for Star Trek : New Horizons.

Wow! I can't believe that you ressurected this Mod!

The 2.7 patch has been released, and it has a lot of new features for modding that may require a rewrite of some elements of this mod. There will be an update some time after the patch is released, but may take longer than expected.

HOLY CRAP! I remember this Mod! It was made before V2.0 !

Is this save game compatibile?

wait, people actually try to win stellaris? I thought the goal was to just not die by the end.