"Never build...", "What's the point of...?", "Lamest UU / UB / AI...", "How to fix...." I keep seeing the same few game-balance questions over and over again: useless buildings, units, and wonders; weak civ UB/UU-trait combos; and some consistently sub-par AI players (I'm lookin' at you, Toku!). While the utility of some buildings, units, and wonders are certainly more strategy-specific, some are also clear under-performers regardless of strategy or Civ (castles, most obviously). But enough whining - what do you do about it? What are your favorite re-balancers? First obvious candidate: Castles obsolete much later, like Steel or Steam Power.