Anybody knows some fast fortress?

sorry, but actually, its not...
this building is, looking at the ability to stop enemies, worthless:
a builder only needs to hit it twenty-four times to make a tunnel, fourteen if hes very lucky (someone opens the door, and he hits the opened-door-block) so its not a very good defense tower.
there is no way to kill the enemy once they get inside, because of the doorspam, and from the archerspots, its only just possible, with the one on the left.
in other words: they break your door, youre dead.
also: no place for shops...

 

You´re right, but sry... I didn´t really count how often a builder have to hit a tower to break it... If you do so, every tower has its weakness. The most builders try to ladder over a tower....
But back to my tower.
To place some shops, you just have to change some things. Like I said, this tower is a base tower and it can be customised...
The builders which get in, maybe fall into the spike trap. Otherwise there are many ways to show the intruder who is the king.

But the most importent thing is, there is no perfect tower

 

vaugens towers on mole are pretty perfect