Okay think about this: You lead with your venusaur against heatran and he thinks, "kekeke i can stay in and magma storm!!" and you be like, "EQ!". Then, he goes out to latios, and hp fires predicting your ferrothorn and you hit him with the big fat one 252+ Atk Life Orb Venusaur Outrage vs. 4 HP / 0 Def Latios: 330-390 (109.2 - 129.1%) -- guaranteed OHKO