Long, long time leecher, first time contributor.
Here's something I found a few minutes ago in Alterac Valley, thanks to XP in battlegrounds!
Above Thrall's building is in post #3!
From picture 1, just stand next to the spike. Jump and inch forward while you're still in the air to make your way to the top of the spike.
From the top of the spike, you can make the jump to the larger spike by aiming at the lowest part of the top of it.
I use it as alliance to heal, but I suppose a few horde ranged DPS could cause some problems from that position as well.
Enjoy!