in truth man it sounds like you're clueless to how to fight a sunbreaker. I've down one with simple fire along with simply outlasting one. Bow can stop one in their tracks, Golden Gun can snipe him out with his shots. Heck you can snipe him out/gun him down with team fire if he's in the middle of running/igniting. The hammers aren't rapid fire/non stop so you can pace it out and the biggest way to deny him is to jump and fly around. A smart skiled player can stop one no problem. I hate to say it but this is an honest truth: Git gud m8. Because the only ones who'll have problems with a sunbreaker are people aren't too good at crucible and don't understand the class. Fought a sunbreaker Titan to Titan. Fought one as a Nightstalker. They aren't that big of a problem if you're paying attention and known when to back up and bait em or shut em down.