In some ways, that makes the card more appealing because theres more that you can do with it, but if youre interested in keeping the power level of your Cube a little lower, then Seasoned Pyromancer is certainly the more modest choice
While this decklist is definitely formidable right out of the box, some players may want to make a few upgrades
When used in conjunction with cards such as Deceiver Exarch or Kiki, Jiki, Mirror Breaker, Splinter Twin is able to easily go infinite, creating infinite numbers of tokens with haste
Circle of Protection: White seems rather weak against a color designed to destroy enchantments, and many blue decks can take complete control of the game before leisurely bouncing a Circle of Protection: Blue (assuming they aren't just decking you to begin with)
Attune with Aether: Good enough with the land draw, and the Energy gain is a nice bonus