Hi.
To be honest that warrior of the week thing sounds very intriguing.
As you said, it's a great incentive to get your members to war.
The only thing I find difficult about it is, what will be so great about being warrior of the week? Sure you will be loved for doing wars and stuff, but maybe you could implement a small prize?
We were going to do something similar with (le) - everyone month there would be a tourney for the best player, and the person that came out on top in that month got to wear a special texture.
Something like that could come handy for this idea.

I haven't posted here forever, sorry baes.