Suncrusher.
Travel between galaxies in a matter of minutes.
Useful, but the people who use those drives are either smashed to near-extinction by a recent major war (The Asgard) or vanished into assencion a very long time ago (The Milky Way ancients) The only other way to get that kind of travel speed is Stargates, which will only come into effect after they've settled in to enemy territory.
Also, sufficient power and numbers disparity exists that using superior speed to concentrate their offensive and defensive actions will be of limited utility. The empire will be able to meet them with sizeable forces on multiple fronts.
Not especially useful if they can't retreive their dead from the battlefield, or if there's not much left of the dead to be regenerated.
Destroy all life in the galaxy, or target specific species.
Abandonned Ancient device that was destroyed not long after its use against the allmighty lego-bugs. As of Season 10, it's not a part of their arsenal.
Take over a person's mind without anyone realizing it.
If you're referring to the Goa'uld, it'll be realized when a reoutine medical checkup reveals a rather large snake in the person's neck.
Make bio-weapons that cause planet wide death to specific species in minutes.
Note that Stormtroopers wear sealed armour, and the Empire is quite willing to respond to biological warfare with "Melt the surface of your planet into molten goo." Hell, they went to "Blow up your homeworld, killing its billions of inhabitants" just to interrogate a prisoner.
A ZPM was reported to contain enough energy to destroy an entire solar system
No, that was an experimental reactor that was built around the same principles as a ZPM. If was unstable, and lost in the explosion.
Grow adult clones in a matter of days or hours.
Aldult clone, meet several hundred Soldier droids - Play nice.
Even cargo ships are capable of cloaking or traveling in the corona of a star.
Stargate cloaking systems have been seen through before, and Such devices are not unheard of in Wars. Countermeasures exist to deal with them.
Advanced armor that deflects or absorbs almost any weapon, including bullets, energy blasts, and explosives.
Ah yes, the Kull warrior. Have we even seen any of them around since Anubis was defeated? After all, this is taking SG as of Season 10.
Either way, we have no uppper limits on what Kuls can take, and they made up only a small elite portion of Anubis' army. They would be analagous to things like DarkTroopers, who are quite a step above the standard Footman.
I've only seen up to Season 8, so I'm missing alot too.
Add to that the main characters in Stargate can all shoot straight, and have repeatedly defeated technologically superior enemies, Star Wars seems lacking, and Star Trek doesn't have a chance.
Technologicly superior enemies who limit their subjects to the lifestyles and education of medevil peasants, and design their devices to be loud and flashy, rather than direct and practical.
The show made a point of this.