Will it help if Astro have slow Effect add to Gravity?

[TankHunter678]

Will the duration go down below 8 secs if slow have been appiled a third time? Will a total of 27 secs enough for the big pull?

I do not know, because Urianger does not actually cast it multiple times. That being said, 27 seconds of slow is more then enough time for a standard big pull with a standard group.