One for one isn't really needed in this deck since you won't be needing to summon Will-o-the-wisp unless you already have another Umbral monster out. You only need Barian's Force, so Numeron force is obsolete (Don't get me wrong, negating everything on the field is good, it's just not the best for every situation). Number 50 isn't really necessary, much less is King of the Feral Imps, but you can keep those in if you want.