Problem FTB Sky Odessey Game Over Crates

[Xecuter02]

Hey i am trying to get into the late game and want to have one of the 3 creative upgrades from the Game Over Crate. But this Crates are just very rare and the chance to get one of the upgrades is very hard too. I am using Woot and 9 Wither Builder to get the Crates. Does Someone have an advice for me to get the crates/the upgrades better and faster.
Because idk what to do at this point.

 

[HobusJobus]

Hi all,
Just wondering if there's something up with Woot and game over crates? I have managed to get one crate after many hours using a wither builder and mob crusher, but after several flushes of my Woot system and even changing the config to allow 1,000,000 iterations for learning I have not seen one. Have the rates been nerfed into oblivion? considering the chances are roughly 1 in 3.3k you'd think I would have seen a single crate? just curious as to whether it is my luck or if there's something going on.

thanks