I changed a lot of things now. Turned Heatran into a Sunny Day user and Donphan into a Choice Band. I'm still testing somethings to replace Rotom-h. I used Azelf that locopoke suggested and its working pretty well. As joshe suggest I put Vacuum Wave in Infernape to help me against SubPetaya Empoleon. Losing HP Ice is not a big problem now that I can deal with it with Donphan.
Thank you everyone. Your comments are helping me a lot. =)