User blog comment:So-Pro Warrior/Season 1-Battle 6:Battle of the Battle Bred Species: The Krogan vs. The Sontaren/@comment-1683193-20130301121723

Just saying, the final battle was kind of innacurate. Sontaren ships are effectively immune to modern day nukes. Now, the standard ICBM deployed by the US today carries 510 kilotons of explosives, 15 times more powerful than the main gun of an ME Dreadnought. If Sontaren ships shields are strong enough to shrug off modern day ICBMs like nothing, ME ships won't even scratch those things shields. As for their weapons, Sontaren warships can crack planets:

"The moon wasn't even a physical barrier and the fleets could have conducted a war without moving. Guided missiles were quite capable of flying around Pazithi, gravitational lenses could bend energy rays around the moon's thick atmosphere. Or, if that proved too subtle, just about any ship over the average size from either fleet contained ordnance that could crack apart the moon, and the larger ships could have used graviton beams to direct the radioactive rubble at key strategic points in the enemy fleet."

Even if you added in the rest of the ME universe including Reapers it would still be a curbstomp.