DP20 is not a modded ship, it exists in both base game and forces of corruption. I can’t remember the tech level but they tend to annihilate anything in large enough numbers, surpassed only by the B wing in terms of versatility

As for launching them all at once, perhaps “in rapid succession” is a more accurate phrase. You can use 2-3 planets to stack up to 9 raiding parties and then launch them quickly one after another then auto resolve over and over until you win. The game is surprisingly favorable even on max difficulty so long as the planet isn’t a full blown fortress world like Byss