I am trying to find a thread where it was discussed parrying/deflecting Fire from planetary scale weapons by Lightsabers and some House rules for it.

I have tried searching and can't locate it, can anyone help?

https://community.fantasyflightgames.com/topic/192613-ship-to-ground-combat-is-deadlier-than-shown-in-the-canon/

that is the one, thanks 2P51

De nada