energy transmition lens and fighters.

[Baron Munchausen]

The combination of Crystalline Armor and the shield-boosting "Energy Transmission Lense' does give Crystalline races a very strong defensive advantage. Even though the Shard Cannon is relatively weak offensively once shields are developed a few levels, it's so hard to destroy crystalline armor equipped ships that they are very likely to get the chance to exploit their special weapon.

I think that Temporal is about as strong offensively as Crystalline is defensively, though. The special weapons available to Temporal races are very nasty. If you can afford the points, taking both of these traits together would be truly evil -- if you get the chance to research all those tech levels.