Resurrecting this old thread with some 2 Power Combos:
Identity Crisis- Duplication, and the power to copy someone's appearance and powers. All of the sudden, there are 10 of the same person running around. Mass confusion ensues.
Stampede- Duplication, plus shapeshifting into animals. All of the sudden, where one boy was just standing, there are now 10 bears. Mass destruction ensues. Want to be more of a swarm? Turn into bats, insects, rats, ect instead.
Astral Animal- Astral Projection, plus shapeshifting. Your soul can now leave your body and scout out the world around you, as an animal. Your soul is now better fit to defend itself if attacked, and you don't have to worry about the bad guys figuring out who you are.