Both the 30 HIGH PARK and 189 STOCKYARDs buses will have 20 minute headways. The 55 WARREN PARK bus currently has 30 minute headways in the non-rush hours (10 minute during rush hours), see
link. So the combination should be no problem. Of course schedules will always be subject to change, depending upon ridership.
There still is the 26 DUPONT bus, that turns off Annette Street. It was renumbered from the 4 ANNETTE bus, to make the "4" available for 4 SHEPPARD subway line. Before the fare zones were eliminated, people would walk down to catch the 4 ANNETTE bus to JANE STATION (or ST. GEORGE STATION), to avoid paying the zone 2 fare on the 35 JANE bus.