Bring me your Unloved, Underappreciated, Underestimated, and Underused Techs!
Which techs/abilities do you like to use as your "secret weapons" that are maybe on the underappreciated side? Or at least less commonly seen/used. Seleucia, for all his exaggerated illuminators-too-good data, I can appreciate for at least trying something different -I love finding or seeing people use underutilized ships, abilities, techs and moving away from cookie cutter builds to bring that element of surprise. Personally, these are my current favourites:
Anti-Matter steal on Disciples: LFs can often fade into the background late game but this research tech makes me buy them again later in the game when you're dealing with bomber spam (drain carrier anti-matter), Titans, and possible higher level Cap ships. Acting as a conduit to steal anti-matter and replenish your own Titans and Caps with it is awesome...
Phase Inhibitors: of course, people do sometimes get these but I don't see them as often as I find myself using them. They really punish people for not scouting and they allow you to catch and punish those pesky multiple gravity well jumping, behind the front lines raiders. They buy a lot of time for allies to come support or for you to quickly build up a repelling fleet back home or a temple of communion to Wail them with (if as AR obviously). A network of phase inhibitors and temples of communion as AR is pretty much impassable.
Mine Control on Aeria Drone Hosts: this is admittedly not as useful vs people as the AI, but at least it's something the AL have going for them. Late game annoying turtlers refusing to surrender and lagging the game? All your mines are mine with this tech.
Any other underutilized favourites?