Trainer Tony Gollan will use historical weather patterns as a guide to autumn carnival targets for Spirit Of Boom and Temple Of Boom.
Spirit Of Boom will be aimed at sprints in Melbourne because it is traditionally dry and warm during the autumn and the entire prefers to race on firm surfaces.
His stablemate and half-brother Temple Of Boom prefers rain-affected tracks so Gollan will race him in Sydney, where he will defend his title in the group one Galaxy.
Spirit Of Boom will have his first serious test this campaign in a Doomben barrier trial on February 12 before resuming in the group one Oakleigh Plate (1100m) at Caulfield on February 23.
Gollan is pleased with Spirit Of Boom's progress since his Perth campaign where he finished a close third to boom sprinter Barakey in the group one Winterbottom Stakes at Ascot on November 24.