Infernal Mines is a good Murky map. It has tons of easy camps and a fixed objective in a small area. For this map I recommend the slime build with March of the Murlocs.
We will lane in the top lane and the goal is to get at least 1 bribe stack. When the shrine countdown start we want to go to our shaman camp and bribe him and kill his two dogs. Then go help team kill skeletons. Focus the skeletons and don't chase kills. Plenty of times I've seen my team lose the boss because of this.
Like Cursed Hollow you need to get to shrine ahead of time and setup your egg and hide so you can ambush the enemy team with March of the Murlocks
If your team dies. Go take camps and lane. If your team wins go take camps and lane.