Any advice/suggestions to my Kefka deck?

Hey guys! I built a [[Kefka, Court Mage]] deck and I want to hear any advice, suggestions and your thoughts since I'm not sure with the [[Niv-Mizzet, Parun]] as a wincon and the ramp/removal ratio of the deck.

Should I put more ramp? Blink? Removal? I am planning to remove [[Aetherflux]] and [[Grapeshot]] and changing them with [[Dualcaster Mage]] and [[Twinflame]], is that a good idea?

Here's the link to the deck: https://moxfield.com/decks/5LuVjkO-jkyKr4drVYNLHQ

Thanks in advance!