T. Reich
Arcane
Same goes for environmental trainng and medicine as well. They are only occasionally useful, but ultimately are a pointless waste of skill points, if you're a power-player.I think it's one of the drawbacks of Deus Ex' pretty good design. There's probably no part where you need swimming to succeed, be it optional or mandatory. It's always possible to substitute it with other skills or some equipment. In turn that makes swimming a bit underwhelming, since most substitutes have more potential applications than the swimming skill.
You could however turn JC into Aquaman, if you wanted.
I take a fairly easy-going attitute towards such kills as long as the rest of the system in a game is decent, for two reasons:
1. It's pretty hard to balance everything to be useful, so if most of everything is useful and fairly balanced, the devs can already be congratulated on the job well done.
2. I'll powergame the shit out of the game system anyway.