Well it was a joke and would add too much complexity. I think we've got the right mixture of simplicity and more complex measures.
Relaxation is important, especially considering you like to throw matches in the diplomatic powder keg.
Speaking of things blowing up, let's go to the Dragon Kingdom and watch the lulz ensue:
Venom vs. Shinobi
Andross, like any true evil genius, can't admit when he's bested. The war continues.
Venom has 18 income to Shinobi's 25.
Venom recruits 4 armies; Shinobi 5.
The Shinobi enjoy +3 to all rolls, but that doesn't stop Venom from attacking.
7 4+3
5 1+3
6 8
8 5+3
The first assault has 2 draws, 1 defeat, and 1 victory.
The second assault is 3 armies strong.
3 3+3
3 10
9 6+3
2 defeats and 1 draw.
The third assault has 2 against 3.
6 7
7 1
1 loss 1 victory.
3 armies attack from the capital next.
10 8
3 8
8 2
2 defeats, 1 victory.
The Venomians are down to 6 armies total, while the Shinobi have 12 at the front and 1 more near the capital.
--
The Bride of Constant Vigil orders 4 armies to attack the capital.
1 9
5 1
5 3
10+3 10
3 victories, 1 defeat.
One more army is dispatched to attack the capital.
5 3
Andross may wanna get in touch with Dash or Andrew; he's gonna need a place to live.
10 5
1 More Venomian Army is destroyed.
In total, 3 provinces have changed hands. Andross has only 1 army remaining; the Shinobi have 12.
Furthermore, anyone who borders Venom has a casus belli on it.