A few notes:
Windranger:
Have been trying Carry Windrunner in offlane and mid. Variable success. I love the attack animation but I feel that spamming powershot eats all my mana very quickly, even with a bottle.
When roaming, sometimes I feel my teams don't know how to make use of my shackeshots. It's so satisfying to get a good shackle but then doh when no one follows up.
I prefer to get 3 or 4 creeps low with auto attacks and then hit them all with a powershot for maximum farming in the lane-ing phase. If it hits the enemy its just a bonus.
I really feel that blink is core on WR though. Often in fights you're in a bad position and cant get a proper shackle without a blink. Nothing is more satisfying than a 2 man shackle - powershot double kill, or a blink - shackle - ult kill