Defensive wall for me worked always well... and we know the story, every SA can be, well, or bad proggrammed, some of us, have good experience with A SA and bad with B SA due our T11 story, and others, good experience with B SAand bad with A SA... if I buy a ST at now... yeah, maybe I will but a Scout directly, but... going to negotiations I have a -1SP scout and I can see how he perform + can select one of -22 age... My best scout now is Grzyb, obtained via negotiations so... thats all Ive to say.
I choose the defense. xD