I think the to towers at base are to weak !

[DerSatan]

Hmm lets make them able to be built on ruins.. I think its a pity to introduce new towers and not make them available to be built. They could be slightly overpriced, like 3500, so they were mainly for the very very late game or the trader. This would mean they wouldnt be called main tower, but another name can be found for sure. And rebuilt ones dont make the HQ invulnerable again, too, of course.

I'd also like a better Hitpoint regeneration for them.