This build for Bloodseeker has won me many games. This is my first published build, so advice would be greatly appreciated.
Ability Tips:
Follow it as given. If there is a Riki, Nyx Assassin, Clinx, Bounty Hunter or Weaver don't upgrade the Bloodrage ability more than once. Use Rupture as much as you can. Get as many last hits on creeps when your health is low to regen some of it back.