What Traits / Tactics are considered cheap/cheats?

[Alneyan]

Emissive Armour has only one huge drawback in stock: it has only 50 hitpoints, which means it can be taken down rather easily, especially if using CA/OA. Still, it is worthwhile if you are using mundane armour, since a 20 or a 25% damage reduction is better than putting more armour on your ships.

Emissive Armour is also great against those players who like Lightning Rays and/or Destroyers (say, RexTorres): in this case, the Emissive Armour will absorb most of the damage, ruining the day for the other player.