I fully expect the first reactions you guys have as you read the help file and start using the system to be:
First: "This is really complex." It's actually not all that complex once you get your head around it, though there are a lot of variables in it.
Second: "These battles have no skill." That is, in fact, true. The skill in mining comes in making a string of decisions where you make more good ones than bad ones. Those decisions include things like what comms to mine based on player demand for those comms, how big a mine to open on what size lode for what comm, the mix of squads (soldier and mining) to stick in a mine, when to attack another player's mine, when it's worth taking a stronghold, and so on. It's all about whether you're good enough to turn a profit over the long-run, not about whether a single mine turns a profit or not.