Re: Silly questions:
My attitude is that you c an pronounce stuff any way you want, since it's made up, and I have a terribly inability to pronounce non-American vowels.
I pronounce Aezin with a dipthong as in "Aerial" or "bagel" (an ash, basically), and Ctesifon "S'TESS-ih-fahn."
But your idiosyncratic pronunciations are perfect, too. whatever you hear in your head is fine.