How would you treat an unresectable eccrine carcinoma of the skin of the face?

I would prescribe 63 Gy in 35 fractions 250 kvp with a Thoreaus filter and lead collimation on the skin and elective neck RT with 6 MV using an AP field. If it is too extensive for orthovoltage, I would recommend IMRT or protons depending on location and extent.