Tech

The Tech Element
The Tech element is the best element, recently passing Magic with the arrival of the Robot. That is expected as it is the "futuristic" element with some of the most powerful minifigures in existence.

Best Tech Team
The best Tech team is:
 * Sheriff
 * Alien Trooper
 * Robot

Attack
Use Sheriff to lock up enemies, and then line up Alien Trooper regular to pulse through as many enemies as possible while using his special for extra damage. Alien Trooper will be providing all the attack, but make sure you keep enemies locked up as he smashes very quickly under enemy attack.

Defense
Quickly drop Alien Trooper special on the ground and then switch to Robot, who can drop his specials and be healing very fast through the sponge upgrade. Sheriff can also be used to lock up enemies but Robot heals enough that this is unnecessary. Keep in mind that in a team, this defense method should only be done when under fire from ranged enemies as it just stalls and doesn't do very much damage.

Building
Robot can build quickly and heal at the same time with his and Alien Trooper's specials.

Solo
In a solo run, where enemies have less health, the Defense strategy listed above can work very well to smash a large group of enemies quickly. Tech is a strong enough element that you can smash the enemies in timed runs before building, but Robot can build under fire when under healing from sponge or with enemies locked up by Sheriff.

Backup Minifigures
For Sheriff:
 * Disco Diva
 * Santa

For Alien Trooper:
 * Alien Avenger
 * Galaxy Trooper
 * Galaxy Patrol

For Robot:
 * Plumber
 * Grandpa
 * Rock Star (for defense)