Sooryavanshi has scored 680 runs in 15 games with one century and four fifties.
Moody suggested that GT pacers become very predictable when there is no movement on offer.
On the second attempt, Parag called loudly, won the toss and elected to bat first.
Winner of GT v RR Qualifier 2 match will face RCB in IPL final on May 31.
Virat Kohli had taken over as India Test captain during the 2014-15 BGT series.
RR defeated SRH by 47 runs in the Eliminator game, thanks to Sooryavanshi's 97 in 29 balls.