3. Sgt. Hammer
Hammer’s low mobility is a huge liability, but she makes up for it with huge damage in siege mode. You’ll probably start up a cool siege in lane—you’ll be doing tank things and damaging towers and everything will be going great. But then you’ll look at your minimap and notice some enemies just went missing in the fog of war. “Oh, I should probably back up some and be careful.” But before you can move—surprise, it’s a gank! As is standard, avoid unsieging at all costs because that’s the honorable way to die.
Hammer is especially weak on large maps like Sky Temple because of her atrocious movement speed and setup time. When you can’t get to teamfights on time, just keep plowing forward into their base and don’t stop for anything.
If you do happen to make it to teamfights, your allies will probably dive incredibly deep, fight outside of your siege radius, and die. That’s okay. As long as you stay sieged, no one can touch you…except for Kerrigan, Illidan, Tyrael, Artanis, Kharazim, Muradin, Sonya, Tracer, Thrall, The Lost Vikings, Zeratul, Xul, The Butcher, Greymane—you get the idea.