I was on Eternity's scripted fortwars the other day and I was impressed by how much more fun I had then at a normal fort war server. There were still quite a few flaws but nothing terrible.
As the title says this would be a gamemode or servermod (like cityrp) and make the objective to destroy forts.
What I think should be added:
Allows players to form teams with leaders. Names will be chosen by the player and any team member will be able to enter team vehicles and edit bricks
Allows players to die destroy other players build using a tool. When destroyed the player will collect an ore used to upgrade team. Very slow process destroying bricks so people don't have to rebuild their base every 5 minutes.
Allows team leaders to declare alliances with other teams
Allows team leaders to invite other players in server to team
Will allow teams to rank up after destroying builds. Ranking up will allow the player to destroy other teams bases faster and will allow team bricks to have more health.
I will add more as suggestions come.