This build aims also to let you support if you can't snowball like you need to. Because there are probably going to be other heroes better equipped to carry than Earthshaker they should get priority in terms of farm and kills. Your first job is to support, be tanky (if needed), then deal serious damage.

When you get your Blink Dagger, when starting teamfights initiate with fissure, blink in and echo slam. Fissure should also be used to prevent enemies from escaping and to save your teammates.