I heard that when using 301 re-directs for authority links it's enough to purchase a HIGH PR, AGE OLD domain & re-direct it directly at the registrar level itself. Like just re-directing the domain with parked page would work & seems that there's no need to host the domain? That's correct or we need to host the site for some days with content to get in dexed & then re-direct? which one would be effective? help appreciated.