Use Su-47 Berkut with Saam missiles. After destroying the generator bit eaasier to shoot down Fenrir- at least in close range.

i use my beloved wyvern :D its like totally tuned.
SCRAM jet engine,
thornback fin,
ceramic armour,
long range MSSL,
Sniper OS

this works perfect for me :)

Well! I always use f22-raptor it is the fastest and very good jet with quick moves

I use X-02 also with these part:
SCRAMJet Engine or Hayabusa Engine
Adv Actuator
TiAI armor
Tracker MSSL
Sniper OS or AAM Jammer

thats the easiest way to beat that lvl there are other way i used but its harder......

i also use x-02
parts:bullet engine,adv actuator,tiAl armor,long range missile and tracer

try it it maneuvers like fenrir

You need a very mobile aircraft eg the F-22,S-32,SU-37,SU-47,Fenrir,Falken,Caribun,etc and either SAAMs, XLAAs, XMAAs,or QAAMs IN Fenrir 's case LSWMs

I suggest the SU-37 with XLAA or QAAM (but I prefer XLAAs), or the X-02 (with XLAA) in two configurations:

A.
-Light Engine
- ///
-TiAl Armor
-Long Range MSSL
-Sniper OS

B. (like alpha001xx)
-Bullet Engine
-Advanced Actuator
-TiAl Armor
-Long Range MSSL
-Sniper OS

The X-02 is a really good plane to use, i use it all the time. My setup:

Hayabusa Engine
Adv Actuator
Composite Armor
Long Range MSSL
Salamander

The ADF-01 FALKEN is the best plane to use , it has the best speed, defense, mobility, air to air and air to ground . also with the TLS it is easy to kill a fenrir with one hit

I suggest a fast, good firepowered jet like the F-15S/MTD (It's my jet of choice, thats why :D) With XLAA equipped, its a good way to dish out the Fenrirs after destroying the stealth generator thing (i forgot the name of it). After finishing them off, screw the Unknown target and the Star unit U-2 (If you want) and quickly destroy the Fenrir escaping, then dont go for tempting entrance with the Unknown and the U-2 (it's 100% chance that you cant get out then crash) then rise up the hole,
Or use the the FALKEN with good parts tuned with TLS