While I have certainly made some "mindless" moves in this game

, I believe the "mine-less" aspect has more to do with the AIs' performance so far. While human players can take them (almost) in stride, mines seem to pose a much harder problem for the AIs in SEIV. If I understand Master Belisarius correctly, it's impossible in SEIV to program an AI to build fleets with the proper number and design of minesweepers. In my first big game against the AIs, for example, by turn 100 the Narn were building battleship minesweepers with level 1 sweeper components, and sending them singly into my fields of 90-100 mines. The AIs do put haphazard fields at jump points, but apparently nowhere else, including planets. Since I consider SEIV's mines feature "gimmicky" anyway, I didn't think I'd miss them (and I don't).
Anyway, last night I had a big turn (#68). I had recolonized a border system sterilized earlier by the Aquilaeians, and was building weapons platforms in a frenzy (I had colonized both a planet and its moon to double production). Unfortunately a 22-ship CR/LC Aquilaeian fleet soon jumped in-system and headed for the planet and its rag-tag fleet of 10 LCs. Two jumps away, meanwhile, the 8 cruisers I had gathered to reinforce the first system were faced instead with another CR/LC fleet (of 20-odd ships) that had just blown through the satellites guarding the warp point.
My anxiety was misplaced, however. The cruiser fleet annihilated the second enemy fleet without loss, thanks to fleet/ship training, Level 2 ECM, and Level 3 Stealth/Scattering Armor. The first enemy fleet bypassed the recolonized planet (for now), giving me time to put two more weapons platforms in place. And on the other side of my little empire I captured the Narn Homeworld intact--just in time, too, because I also captured 5 undeployed satellites equipped with Talismans (Talismen?)!

With luck the Narn are too weak now to take advantage of their breakthrough, but I forsee hard fighting on this front.
BTW, the more I see of the Narn in these games against the AI, the more I wonder why they didn't make the final round of AI Deathmatch 3. With their strength in research (125%), they reached PPB V before I did, developed intelligence capability shortly after I did, and despite high tech cost developed the Talisman about the same time they did in an earlier normal tech cost game (and ahead of the Tessellate, winners of Deathmatch 3). Some time I'd like to try more min-maxing on their attributes (many are left at default) and put them up against the Tessellate.