[Q]

You can however add cloaking of the five different types: EM active, EM passive, gravitational, psychic and temporal.
E.g. you have two cloaking component on a ship. The first EM active level 3, EM passive level 3, gravitational level 2, temporal level 1, psychic level 1. The second EM active level 2, EM passive level 2, gravitational level 3, temporal level 3 and psychic level 3.
This gives the ship a cloaking level 3 in all five types but not more than that.