Greg, ya did good... Yup, the descending turn is the best way, so you
can keep the other plane in sight... Other than that the only
suggestion I can make is to stop worrying about the self loading cargo
(passengers) and if (when) you get another converging situation
maneuver decisively to get him off your nose... Don't waste time
talking to ATC until you have it under control... Don't worry about
the controller... Your PIC responsibility is take the evasive maneuvers
needed, NOW... You can listen to the guy drinking coffee in an
air-conditioned cab, whine about all his problems later...

cheers ... denny