For some reason this mission is more difficult than it should be due to the AI behaving weird. Alpha wing doesn't engage the Dragon fighters, even if they attack Beta, which they are already ordered to protect unless i have them order to attack the Dragons. Beta wing rarely uses their Tsunamis. I have seen once Gamma 1 depart for no reason. When calling for Delta they stay on the field for a while, then they depart for no apparent reason.
Also wasn't the Zenith supposed to escape when it reaches the node? Because in my game once it reaches the node it just stays there and never activates it's subspace drive.
I'm using the latest version and FSO 3.7.1.