Talk:The Limbo Theorem/@comment-1023950-20141027215112

All of the Archwing Interceptions took place on Syrtis, Mars. You'll go back to each one for Proof Fragments, which makes this a little rinse-and-repeat.

Second Excavation, for Systems, comes from Wendell, Phobos. The issue with this mission is that you're fighting primarily Corpus enemies (yes, on the Grineer tileset) with Grineer Power Carriers with jetpacks, so it's more than likely that you'll have to do a lot of running to reach all the power cores you'll want because all the carriers will die a mile away. No Sand Skates, so your obligatory annoying foes are the Railgun Moas who can target the Excavators through walls from a great distance, which can make defending a huge pain in later waves. (Used Frost, was paired with another Frost on his second run, hilarity ensued. Completed mine first run in 11 Excavators.)

Third Excavation, for Chassis, comes from Ose, Europa. Once again it's Grineer Power Carriers with primarily Corpus enemies, although they're standard Grineer units without jetpacks. Keep in mind that, on Europa, your shields are going to get halved and deteriorate further any time you're outside; having a Frost is wonderful, since being inside of a Snow Globe stops the decay. (Used Frost again, paired with a Nyx Prime on her second run who had marvelous Chaos uptime and range. Completed mine first run in 16 Excavators, only lost one revive.)

Last note: The Chassis requires 1 Argon Crystal to finish.