I edited the file to make it impossible to damage your ships and stations. I then went into the Data Miner mission and captured the Nexus and everything normally. I sent the Data Miner and the Borg came. The Enterprise was easily cleaning up, but there were so many ships that the Enterprise couldn't handle them all. And the Data Miner took damage and was defeated. WTF?
Seeing as how the Data Miner appears nowhere else in the game, instead of applying the float_damage cheat (lets you make all your ships invincible by altering the float_damage line in the RTS.CFG file) you could alter the Miner's .odf file.
If you add the following line: shieldProtection = 1.0 and then alter the maxHealth to a ridiculously high number (say, 1e6) while increasing shield recharge rate markedly (shieldRate = 1000), no Borg vessel can touch the Data Miner. By including the protection line, you don't have to worry about crew losses either.
:assimilate: Resistance is futile :assimilate: