Nice model, but you had to max out and add 8 Destroyer templates.
GW didn't price individual weapons on the titans because you arent really supposed to minimax them. Not only does this make the itan uninteresting to look at despite the fly head but also distinctly unfun to play. All in all a waste of modeling time.
I do hope those weapons are detachable.
I could say though as a backhanded compliment that not only have you made the Titan look like a War machine of Nurgle, but you have also made it smell of rotten cheese.