Right now, I’ve got it as ‘s k ay’,
I’ve looked at the diphthong chart. I use “ay” in other places and it sounds ok, On this one word spot it just doesn’t sound like a long “I”.
It is hard to describe what it does sound like, all I can say is it doesn’t sound right. I tried adjusting the Tension, which helps sometimes, but no joy
It would be good if you could describe more precisely how it should sound.
To me both articulations (sky and eye) sound pretty much the same.
I use Asterian’s default voice.
If “eye” already works for you, the easiest solution is to create a small note in front of it that contains [sk] separated, then you can try playing with duration and strenght until you get the results you want.