You always want to start Red Buff, even if top side. You need the extra healing and damage to clear well as Rumble's first clear is awful. Next go Krugs and smite, Raptors, then go grab your Wolves, Blue and Gromp. Next look for gank or scuttle or whatever. When clearing you really want to get your flamethrower to activate when your heat is 50 or higher as it does way more damage. Just spam your W (Shield) to gain speed and heat.