If I may suggest something - I would go for a SAK with all the tools required except for the Phillips driver, and couple this with something like the True Utility mini driver, which would attach to the SAK keyring.
http://www.heinnie.com/true-utility-minidriver
Or if you are a practical person you could probably knock up something similar using a quarter inch hex bit holder, then you would have a wide choice of interchangeable bits.
http://www.heinnie.com/true-utility-minidriver
Or if you are a practical person you could probably knock up something similar using a quarter inch hex bit holder, then you would have a wide choice of interchangeable bits.