Honestly the more you talk the more I think you know exactly what you talking about.I would imagine a bot in solo can just re-log to get a new instance, there is no need to jump around the beacon.
Wrt targets, it can probably just shoot everything in the instance - the fact that the bot is incurring large amount of non-Power bounties certainly seem to back up that possibility; either that, or there is some sophisticate hack being used.
How else can you explain an account that's active for over 24 hours continuously, consistently producing 4k/hour merits? And why would someone overdo a system by 12k? That's 3 hours of work that can be used to undermine another system.
And Murung - that's not a mystery, we have some module shoppers helping them with the prep.
The relog, the combat bounty, the rates, the overdone have you tested all this already to know so much about?
And Tatamo - that's not a mystery, we have some module shoppers in need of merits.