Thankfully, despite being an online trophy, you can get this one yourself. Fire up Multiplayer and create a custom match. From there, choose any settings you like and whichever team you like. You can then press Start to start the match.
From there, nab a few nodes and use the income you get to purchase two electro barriers and when the base attack round comes, you can safely attack the opposing team's base (pretty much all of the enemies will fry up when they try attacking your base). Once either team's generators are completely destroyed, the match will end and you'll get the trophy no matter the outcome.
Repeat this four more times for the trophy. You'll also get the following trophy: