Am I reading it right? Isn't it impossible, or extremely difficult, to prevent an opponent from shutting the post's ability down with Orc development destruction? For example, if my opponent has a deveolpment in play, and I sacrifice my Stunty Smasha to destroy it, can't he just sacrifice the development in response to blank out the post? And even if I clear his captial of all developments, can't he just play a development before his next battlefeild phase and sacrfice it to negate the post in response to any action I take to get rid of it?
I think you really do need to play Dark Elf discard abilities that aren't restricted to your turn (Caught The Scent) or the Battlefield phase (scout ability) so you can knock out an opponent's hand before his capital phase to prevent his play of a development.