You can disable/enable the ESCORT goal to immediately change indexes.
ETUtil.SetExcludeIndexes( "ESCORT_neotics_tank", RegionsTriggers.ESCORT_TANK_LEFT_OFFSETS );
SetAvailableMapGoals( TEAM.AXIS, false, "ESCORT_neotics_tank");
sleep(0.1);
SetAvailableMapGoals( TEAM.AXIS, true, "ESCORT_neotics_tank");