It won’t work because Expression Map doesn’t work this way: you can’t trigger 2 slots at the same time.
You will have to configure your Kontakt instrument differently instead.
To begin, you should set your two articulations to the same MIDI channel.
Then you would set those two articulations in Kontakt to receive a trigger from one slot in Expression Map.
In this case, that slot would combine staccato and marcato.
Hope it’s clear.