Effective and Elemental Crit interaction

Hi! Just wanna ask about the effective mythic’s interaction with elemental crit. Will it change the element when crit is proc’d or not? Example: if i have blight affix on my gear, will it be changed to frostbiting when attacking fire type mobs? Does it work that way or will my blight affix be ignored? Thank you.

I’m pretty sure it changes into just the element for dmg calculation. Blight would only still affect poison dmg. I’m pretty sure but if I’m wrong hopefully someone will correct me.