Is it better to use a AFCI/ GFCI breaker in the panel or do to use a AFCI/ GFCI receptacle?
You can use a breaker or an outlet.  It's up to you.  For outside outlets on my house I chose to use a breaker so I could use regular cheap outlets in the weather, but in the bathrooms I stuck with the outlet style because it was a direct replacement and I didn't have to mess around with the breaker panel again.

AFCI/GFCI outlets only have two sets of screws - Line and Load, so there is no little tab to break off and separate them into two circuits like on a standard outlet.  You can't feed them with 2 breakers.