Okay, so for those who choose to, or can only play solo for whatever reason, having all the items (Casket, Urn, Relic, Tablet, Totem and Urn) in your ship's cargo hold, parked very close while scanning, does not result in any successful scans. I'd be genuinely interested to hear from MB as to whether this mission is fully achievable in solo, without having to resort to open or PG.
Pretty much this. Between that and the endless stream of adjudication errors, I don't even know if I can use any strategies to make any other obelisks light up before these error happens.
I'm starting to get to the end of logical paths to progress this via solo... I see while I was trying to see if I could activate a ruin with the cargo dumped outside the SRV, some people here have already tried it, with the same results as me (i.e nothing).
I've done the brute-forcing to get the 13, I've tried various homogenous and non-homogenous scanning combinations, varieties of 2 x cargo and 1 x cargo, scanning banks, scanning one from each bank, raising all towers, raising some towers, deactivating all towers, clearing only all surrounding pillars, clearing selective pillars to try and make patterns, alternating cargoes...
Quite literally it's getting to the stage where the only thing left for me to do is scan random obelisks with random items at random times, hope I don't get an adjudication error, and hope I just happen to stumble upon the right iteration of items/scans which literally numbers in the thousands when you consider factors like ordering of obelisks and the like.