Both of the features are good.
The application range of anti sound is a little small.
However ignoring the sound skills sometimes has miraculous effects and the power storage can let naughty bullets have the chance to play.
I personally recommend the latter.
1.
Electromagnetic wave + bravado + stand in + 100000 volt character: conservative characteristics: sound proof / power storage hard durable special attack stand in test anti state anti RP electromagnetic wave + bravado double blockade