Word. Honestly, sometimes I forget that this map is 10x10. It feels smaller for some reason, so I don't play with the traditional radar posts, etc. I rely way too much on hordes of scout planes, but in the end all it takes are a couple Cybran T1 mobile AA to make my patrols null and void. This really is a visibility-based map though. I think the more you know about what your enemy is up to, the more likely you are to be able to parry and defend your base while encroaching on his.
I had a lot of T1 ground scouts in place, but unfortunately their range wasn't enough to cover all the areas that I needed. This may actually be one of the few maps I'd consider building walls around or near my main base - that way at least an incoming enemy could be funneled to a few known points rather than walking in wherever he liked.