It would be nice to have some better individual rewards beyond #1 with 50k GP... perhaps giving Lucifer to anyone with over 50kgp or if nothing else having the cyborg as a #2 at 50kgp would encourage everyone to spend money/gems on achieving a worthwhile card. At this point, there is no incentive for multiple guild members to reach 50k gp beyond the first place finisher, and dark maidens are regularly available in the shop and gem recruits... I'll personally end up using the 5* maiden as nothing more than strengthening fodder if I'm in second place.
... something to think about for the future wars.