I'm not quite sure how 'self immolation' could not be applied to Emrys-self... it could hardly be 'self immolation' if the immolated object was something other than the Emrys-self.. in fact... well, he might need the odd bit of assistance like soaked rag in the mouth but I'd say 'self immolating' bit probably makes it quite sure that the object of immolation would be sufficiently crisped up without further reference of application to the same self?
I mean, that's double baking. And what's the use in that?