Warframe vs. Warhammer 40K

SPOILER ALERT: SPOILERS FOR WARFRAME'S THE NEW WAR, WHISPERS IN THE WALL, ANS THE DUVIRI PARADOX, AS WELL AS ANY FOLLOWUP QUESTS AHEAD!!!

A Thing™ happens, and the various factions of 40K find the Origin System. The Man in the Wall meets Chaos, et cetera.

Round 1: The Corpus and the Grineer vs. The Imperium of Man, The Nids and Orks vs. the Technocyte Plague Infestation, Tau and Necrons vs. Sentients, and Tenno and Space Marines vs. Chaos and Murmur/Void Angels, and Sentients vs. Necrons and Narmer.

Round 2: The Tenno, Corpus, Grineer, and Sentients switch places with the Space Marines, Imperium, Orks, and Necrons. How do they fare against Chaos?

Round 3: The Space Marines, Imperium, Orks, and Necrons switch places with the Tenno, Corpus, Grineer, and Sentients. How do they fare against The Man in the Wall?

Round 4: All out New War II between every faction. Who wins?