*Is too lazy to post own argument--steals someone else's*
Why does it seem that we have to constantly establish that the Star Wars universe is the most overpowered Sci-Fi universe available?
With the statistical numbers of the Empire's weaponry, shielding, etc., a single Tie-Fighter could solo an entire Covenant Fleet. Each one of those laser shots from their guns is the equivalent of 2 kilotons of explosives, and they can fire 480 times per minute. And that's just a Tie-Fighter, to which the Empire has thousands.
"The covenant can glass planet! Blah blah blah"
Some of the weaponry on bigger ships in Star Wars get to be as powerful as over 90 GIGAtons of explosives. To put it this way, if something like that hit the Earth it would turn Europe into a crater. The blast would kill everything within 4000 miles of the impact site instantly, and would inflect third-degree burns on anything within 21,000 miles of the impact site. A single shot from one of those ships would make a planet uninhabitable. And these guns can fire every 2 seconds.
And then the Death Star's laser fires with the force of a small Supernova. Not only would it destroy a planet, but realistically it could destroy a large Star and it would destroy a entire Solar System if fired.
And then just the ability to travel quickly is in favor of the Empire, because all of their ships can make FTL jumps over any distance in the blink of an eye, and it doesn't take days or weeks in Slipspace to travel the distance like it does for the Covenant.
"The covenant could kill Stormtroopers hur dur dur"
In terms of ground forces, each one of the Star Wars blaster pistols could one-shot an aircraft carrier and their armor could deflect a hit from a Spartan Laser. Blaster Pistols basically carry the force of a ship's cannons in Halo.
The covenant would get stomped, completely. Humanity would get stomped completely. The Forerunners would get stomped completely. There is no correct argument that can say otherwise. And the only people who say otherwise are people who don't understand the argument at all. We have (stupidly) been given hard numbers for all the weaponry in Star Wars, and it is extremely bull**** overpowered. But that is what it is. Not even the Warhammer 40k universe, which is intentionally overpowered, can hold a candle to it.
I'm pretty sure all of the Star Wars numbers are heavily exaggerated to the point of no one actually following them. Extended universe authors seem to say whatever the hell they want to make something sound cool.
Perfection. Where everyone fails. If you expect nothing you can be happy for everything.