Your small base circle cam is for lifter positioning only. Not a problem in your situation.
I would think that fuel injection should be a major consideration at your altitude variations. Having an ideal closed loop mixture has benefits in every realm.
Yep, my rods are fuelies. Great torque with the only downside being lesser power above 5500 rpm. Inconsequential to me.
For myself, roller cams and fuelies only.