I built a very similar deck to this recently-- since it's built around 3-rounding and defense, I would switch Otto to Belle. Chiara Cr vs. Sandro is pretty much a matter of preference. Chiara Cr is potentially a stronger wall, but prot power cards match her, so I prefer Sandro for his unconditional walling-- only Glorg or Leviatonn (who is banned this week) can stop him.
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