Keeping AI in agressive mode

[Nephris]

Is there a way to keep the AI in agressive mode?

In general I observe the AI flying an attack (plane vs plane), but leaving the scene rather early. This means it is about maybe 60- 120 sec and after it the AI plane heads home. Although it gets shot on its way back home, the AI plane doesnt states back to agressive mode.
I took care of not hitting the AI plane, but firing close enough thus it knows who is firing.

I used the waypoint "free hunt" which is imho actually useless, and i used "attack fighters". Using "attack fighter" in several ways didnt change anything, like using multiple "attack fighters" waypoint on each minute. Usiong "set" on the oponent didnt changed anything.
Of course i fddled around with the skill sliders, but at least on ace the AI (courage 100%) should be motivated enough to get me down.

Atm it is actually not possible to create long lasting dogfights, as AI pilots turn out to be "wieners" and leave the battleground after some time.

So how are your expierien es? Have you been able to create a longer dogfights?