Principle Challenge Rooms (Lua)

[BetaNoire]

How and where do I find these rooms on Lua, that need to be completed to enter the Pluto-Sedna junction? 

What are the simplest ones to complete?

[Dries110]

Puzzle rooms spawn randomly, and some need 2 players to complete,

[(PSN)Hardkorny]

http://warframe.wikia.com/wiki/Orokin_Moon#Halls_of_Ascension

 

Edited May 24, 2017 by (PS4)Hardkorny

[Extirpator]

Random within moon tile. Try crossfire.

Titania will make most of them easy cept for Coaction Drift.

 

Edited May 24, 2017 by Extirpator

[(PSN)decogold]

11 minutes ago, BetaNoire said:

What are the simplest ones to complete?

This a matter of opinion however personally i see the room where you must stand in a spot and have lasers fired upon you for a set period of time as the easiest. This can easily be done with high HP Warframes and/or have a Trinity in your team who will repeatedly heal you.

[JLeetz65]

You see them almost everytime during your journey to each data vaults in Pavlov. Up to 2 puzzles can spawn in my experience. Maybe even 3.