Those spots are all useless. You can be spotted easily from different Assault routes. If you want to be a good defense sniper on Border, learn to snipe while crouching and leaning in stead of going prone, and keep moving.
any good sniper would know not to use those spots. Laying prone on this map is not a good idead, to big of a map. Snipe in a crouched position or lean from a protected cover position.
1st spot on balconey: just go prone on the boxes by that spot. fairly difficult to see but going prone on the ledge is pure suicide. ur gonna b seen from everywhere
2nd and 3rd spots: as a fall back position there alright but u can b cut off quickly and the only way off the exploit is to fall into there fire more or less.
4th spot: this is a pure suicide spot, u'll get one shot off then they will spam the hell outta there till u bug out or die. (dieing more likely)
The balkony spot is useless in the way it´s shown. IF u want to snipe there, stay prone and try to hide behind the tree at the corner wall. You can also get the enemy from the ladder spot. But proning on the wall is simply suicide, because most south snipers on assault check out the balkony first. The other spots show in north are ALL exploits. You will be kicked for using them. Some admins ban you for using them.