The Alphas would provide rearguard security and strategic command capabilities in Bureau Aegis operations, but they would also be appointed as consultants in inter-agency actions with other powers, and they would act in direct contact with the community, providing solutions and, if necessary, eliminating the problem that had led to their deployment by themselves.
If you are looking for a good Lieutenant option or a troop to cover your back in case of Loss of Lieutenant, the Alpha unit is undoubtedly one of the best options within the O-12 army thanks to its Strategos L or Chain of Command options, and a neat complement to your O-12 Action Pack.