I have no idea what the correct balance for the four aforementioned cards is, but having more pieces in our toolbox to fully streamline the deck cant be a bad thing
For example, these six cards show the chaotic end of Book 2 battle involving Prince Zuko and his sister Azula: Combustion Technique Zuko, Conflicted Azula, Cunning Usurper Aang, at the Crossroads / Aang, Destined Savior Katara, the Fearless Dai Li Agents These cards can be found in Play Boosters and Collector Boosters, both in foil and non-foil treatments
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Finally, also getting the overrated stamp is Plasm Capture
You start with just 30 cards each containing simple, basic characters
Whenever a creature you control deals combat damage to an opponent, draw a card