I've been experimenting with the Mecha Set and Thermal Sunder. Cuz setting things on fire is good. Setting more things on fire is better. Cold procs for when you screw the pooch and need some CC.

To use the Mecha set effectively, you have to use a Kubrow. Puppers is there to help spread the fire more.

Equillibrium and Health Conversion for energy/health orb utilization. More of them = more armor. You should be nigh indestructible with your Warding Halo.

I think that the rotation should be 4 > 2 > 1 to set the battlefield on fire while you cackle wildly at the havoc.