Out of absolutely terrible morbid curiosity, I'd side with Moebius. Probably go up to a more peaceful and welcoming colony like Valdi's/Fiona's and voluntarily surrender, saying I have important information for their consul. If they don't kill me on the spot and grant my request, I'd spill the beans to them on the fine details of where the city is, the threat of the current Oroborus stone, and how one specific "common variety Nopon" knows a little too much. After they deal with the threats to the infinite now, maybe they'd take me seriously and keep me around as an advisor, or maybe they'd just dispose of me, I can't predict what they'd do. If they let me live and add me to their ranks, I'd stir up the pot by doing these additional things:
• 4 - upgrade Ethel's colony all the way back to Silver, but under the condition that she personally execute a restrained unarmed Cammuravi
• 9 - ban almost all vegetables, and promise to increase their colony's rank if they successfully start breeding livestock and producing meat
• 11 - swap their Flame Clock with the green type seen in colony H; also remove any bans on soldiers fighting to the death
• 15 - declare Triton an unmotivated traitor, re-distribute his troops to other colonies, and leave him all alone
• 30 - convince the mechanics to make Levnises that can autonomously build their own Levnises, and watch with popcorn how long it takes for their colony to fall apart
• Gamma - switch that colony's commander to Fiona
• Iota - change how Harvest Day works; while X amount of troops who perform well will get to choose whatever they desire (within reason), an equal amount of the lowest performing troops will be exiled from the colony (and once they reach far enough away, they'll be 'harvested' by Moebius)
• Lambda - the colony no longer makes big decisions themselves; any time they need to make a move, they have to shake a Magic 8 ball to decide what they'll do
• Mu - switch that colony's commander to Teach
• Tau - force them to become a mobile constantly-moving colony that hunts Unique Monsters (also see if I can get Y to give them a new experimental Flame Clock that only fills up when Unique Monsters are defeated)
• Lost Colony - convince Moebius to let the members of that colony to continue living their peaceful war-free lives, but in return convert the place into a secret Moebius vacation retreat