I didn't like Fort Wars that much because the fighters that always wanted to fight and not build usually just placed down a brick and spawned a weapon and killed builders. For that, I really don't like it too much.
Spending ages building pretty walls and doors gets you killed.
Locking yourself into a tower leads to being sniped out and having it either taken over or inaccessible to everyone.
Unfortunately the only "objective" most fortwars have is points from kills - the fastest way to get them is to spawn the server's most overpowered weapon and shoot everyone. (or event it to fire a billion homing rockets at everyone who isn't you)