Simply ignore Valen Rudor until he is the last ship.
A response might be "Good! Ignore him and I'll shoot at you!"
Well I say "Good! Roll your 2 attack dice at me!". Look, lets say you've got 3, or even 4 ships. I can't kill them ALL at the same time... I wish I could. But I can't. So I'm going to have to prioritize. I prioritize usually by threat, but sometimes I just might go for a ship that's easy to kill also. Maybe a naked z-95 is at range 1 of my Ghost and I can roll 5 dice on it.... sometimes I just might do that, especially if the game is running late and I need points. But the other 99% of the time I shoot at the biggest threat.
Valen Rudor is NEVER going to be the biggest threat. Ever.
I understand that he will be able to shoot at me, but so will every other ship you bring. Lets say you are running Aces. Vader, Soontir Fel, and Valen Rudor. Well Vader and Fel are OBVIOUSLY going to be my primary targets. You might kid yourself into thinking that I'm letting Valen Rudor run wild, but lets say you replaced him with an academy pilot - he'd STILL be the one "running wild" because he doesn't pose a significant threat to my fleet. He only has 2 dice, and he's NOT one of the ships that can make those dice into a threat. The Inquisitor is a threat. A TIE Advanced with the X1 title is a threat. Omega Leader is a Threat. Valen Rudor is about a threatening as a debris cloud. Sure I MIGHT roll a crit, but I'll take my chances and fly over it anyway.
What do you do against a Procket holding Rudor? With a Procket he's a serious threat.