This strategy is quite risky and will be very costly. It is best executed after the second or third mission when you have at least one Energy Magnet (critical) and a Key Inspiration. This strategy involves building up an army in Global mode and then rushing in all your units for a full front assault on the enemy Origin Core, Glyph Carvers, and any other mission-critical units (Reaper/Detection Drones, Walkers, etc.). While this will not likely destroy the entire force instantly, it will allow you to build a base without worrying about any attacks or enemy reinforcements. Before starting the mission, make sure to completely reach the unit cap in Global mode (for example, use Skylords mixed with Peacebringers due to their sheer power). When starting the mission, immediately create a save. Next, find the Hierarchy base. Once you know its position, revert to your saved game, and bring your Dropship close to the base. Make sure it is close enough where your units only have to walk a few feet but not so that they are attacked the moment they hit the ground. Order all your units to attack the Origin Core. Once that is done, move onto the Glyph Cavers. Chances are that if you have made it here quickly, the Glyph Carvers should only still be summoning the first Reaper Drones and have not begun with the walkers. The next move is up to you -- either chase the drones/walkers or return to base and attack later. The only important objective is that the Glyph Carvers and Origin Core are gone. Note: Move fast, do not hesitate, and do not allow your enemy to build. It is not a bad idea to have Architects at work with a base to fall back on in case of a failed assault and you do not want to restart. Casualties are also going to be high. Most to all of your units will be destroyed, but their cost will be offset by both the Energy Magnet(s) and the fact that your enemy will have no base or reinforcements to summon thus allowing you to build a new army from the battlefield or the Globe.
Universe At War: Earth Assault