You said that you have to be 80-85 to get heirlooms. On my first char ever (undead rogue) i played a lot of random battlegrounds and i got the pvp shoulders. It takes time but it was totally worth it :D. And btw great guide.
You can smooth the hard edges of a selection by feathering. Feathering blurs edges by building a transition between the selection and surrounding pixels. This blurring can cause some loss of detail at the edge of the selection.
How to make non-destructive edits in Camera Raw. Learn how to process your photos using Camera Raw in Photoshop. Edit raw files and JPEGs in Camera Raw to simplify your editing workflow and maximize flexibility. (Try it, 16 min).