So for Felix's Tech rolls, I will allow him to make two in a round. He can apply them to the same 'task' or two different ones...
DC 30 - crack the secret code/nod within the system. This is a multiple action situation as it has been deliberately hidden under multiple and shifting/updating security.
DC 25 - take control of the Doomsday Robot's movement. This must be maintained every round or the crew elsewhere will/can regain control.
DC 25 - take control of the main weapons (lock them up etc. so the robot can't fire missiles or its main cannon). This must be maintained every round or the crew elsewhere will/can regain control.
DC 25 - block all the secondary weapon's fire. This needs only be done once although the crew might be able to unlock them in 10 rounds.
DC 25 - begin to figure out where the robot was based out of. This is a multiple round action as it has been deliberately hidden behind multiple layers of security.
DC 25 - see if the robot is communicating with anyone or listen in on any radio communications between the crew. This must be maintained every round as there are multiple signals and channels and they are contently shifting/updating.
DC 20 - get an map of the inside of the robot.
DC 20 - get a list of all the agents/soldiers within the robot, their names, age, etc.