Questions:

[Alneyan]

1) It depends on the storm, as the highest level of cloaking provided by a storm is level 3 if memory serves, which would be equivalent to the second level of any kind of Sensors. Nebulaes tend to have higher cloaking values, and some of them (the red ones) cannot be pierced by *any* Sensors since they give a level 5 cloaking, negating even the best sensors with their level 4 abilities.

2) Only the best value should be used for your ship, but I don't actually know if it is "Removes 30 damage points from any weapon" or "No weapon doing less than 30 damage points can hurt you, but 31 damage points and above are fine enough".