Arcology Project or Master Builders?

[Kamarov086]

I'm playing as a xenophile and materialistic empire and I was lucky enough to end up with the the Cybrex as my precursors. Now it's the beginning of the mid game and I already have a section of the ring world colonized (that I'm focusing on research) and I am finishing building a Matter Decompressor foundation.
I have a lot of energy profit but not so many minerals and rare resources and I'm afraid of creating an Ecumenopolis and not being able to sustain it. Which Ascencion Perk should I choose first?

[HappySack]

Definitely Arcology Project.

Master Builders is more of a "win more" AP, if you already have a Matter Decompressor under construction then you'll have all the minerals you'll need for a long time and even if you don't you can always trade with any other empire for their resources with all the alloys and consumer goods you can make.

[mss73055]

I most pick master builder when going crisis.

[nilfiry]

Ecumenopolis are more powerful than ever in the modern versions of the game thanks to Planetary Ascension. Arcology is absolutely worth your slots, and should be a perk you pick up much sooner.

Master Builders is basically useless unless you were strictly on a time crunch for whatever reason.