Bribing your enemie's allies to turncoat is an efficient
idea. Giving units is preferable to giving weapon designs as the
receiving AI is likely to refuse units that it can already build itself.
Commandoes are very useful units for capturing units without
fighting. To protect against these raiders, stack your units. ZWK is
designed such that a city can be so well fortified (with City
Fortifications and AA Network) that it must be seiged. Commandoes are
idea for pillaging in this instance since they are invisible and they
can also sabotage city improvements with a protective function.
Comandoes can build emergency launch ramps for V-1 rockets. So V-1s
will not run out of fuel when there is a Commando Bn below them.
Commandoes can also guard torpedoes at the shore if a sub carrying a
lot of torpedoes is in danger.
A good idea is to stack your fighters on top of your bombers.
This will help them to survive any attempts to shoot them down.
Another similar concept is stack them on ground units, like
commandoes or even submarines.