The Sandwich Drone
I've searched for a sandwich build on Robocraftgarage, but wasn't able to find one. As I think such a basic build should be available on this site, I've decided to post mine.
Since the EP weight increase I'm not a big fan of Sandwiches anymore. Now they are realatively slow and by far not as responsive as they used to be. However they are still a good entry point into thruster sticks.
Even with the increased weight a Sandwich can make a relatively good healer drone. They can move over the map fast enough to patch up team mates in trouble (including bots in the sky). They are also a relatively tanky build as long as you can keep moving and spinning - just make sure people can't take their time to aim for your sweet spots and try to make sure the same EP doesn't get hit repetitively. Treat the ground as lava! The AoE damage of Plasma volleys splashing on the ground can do nasty things to sandwiches.
Sandwiches are also kind of viable plasma bombers - though I personally prefer "real" thruster sticks or bombers which can take a beating and operate properly afterwards for plasma weapon usage. Sandwiches are definitely too squishy to be considered as SMG drones.