Final lvl Bowl - Trick to survive and defense was move the Odin to the third floor, build Collectors as many as u can, Blasters and mortars are important, use ur intellect to defense it, let the main floor flood or not.. U decide and recommend to attack fourth floor which was a canyon and retake the flooded creeper of the main floor...
Tht's how I did and I was shocked tht it work and survive... Of course, it took me half an hour to finish the lvl...