What are your thoughts on saving gas for ravens by delaying ghosts and instead using a control group of tanks for sniping infestors?
I have seen last shadow do this when he mechs in TVZ and goes mass raven in late game. During the transition phase, instead of spending gas on ghosts, terran uses the superior siege tank range to snipe infestors in an engagement. It works really well if you siege an expo or, in general, force zerg into an engagement (turtling while taking more bases).
One could add ghosts later when terran has 5 base or more gas but during the transition period would starting out turtling with raven tank and then adding ghosts later work out?