[Chazar]

Sounds very interesting, but how do you cope if those nations cannot reach each other?

How do you extend this sytem to 7 or 9 nations?
Would it be more sensible to retain 2 specific nations to kill (which in turn also try to kill you), but which would lead to two nations being neither you enemy nor someone who shares your goal?

Or would it be more sensible to have non-mutual enemy relationships, i.e. something like
A vs. C,D
B vs. D,E
C vs. E,F
D vs. F,G
E vs. G,A
F vs. A,B
G vs. B,C

so that A hunts C,D; is hunted by E,F; and shares 1/2 of it goal with B,G? It is sort of bad here that C and D play a different role, since C hunts both of A's hunters. It should be a system where every role occurs twice equally...
(having three goals seems bad to me for 7 players)