It has all kinds of variations based around adding or subtracting certain cards, but ultimately a Stage 1 card capable of doing 130 damage on two energy is always going to be a powerhouse choice
This can become handy when youre holding a card and dont want your opponent to know you have an action, as if you press it quickly, it creates the sensation that you arent holding priority for anything
During 2010's Black & White series, the toughest Pokmon of the time had a maximum of 140 HP, only 20 HP higher than the original set's Charizard
Incapsula incident ID: 305000210152205208-367798558045308234
However, there are other rewards to earn for each difficulty, so if those interest you, I'd still recommend at least beating those once
You make the choice for each one individually