While pronunciation of Pokémon names can vary from person to person, if we use the pronunciation of the words in their etymology, we can find the most accurate way to say them.
Gliscor is pronounced GLY-SCORE, from the words glide and scorpion.
Comfey is likely pronounced COM-FAY, from the words comfy and lei (a Hawaiian flower necklace).
I hope this helps, and if you disagree please say so :)