How can you possibly think what to use and what to save, if you don't know the upcoming battles?
"I have an Adira here, should I field it in this 7pt Battle game, or wait just in case the next game is 5pt War?"
Is that thinking or guessing? I call it guessing. There is no way to "figure it out", you just have to make your guess and hope the next battle isn't 5pt War. If you know the next battle is 5pt War, you can think whether to use your Adira now or save it. If you don't know the next battle, you have to guess.
"I have an Adira here, should I field it in this 7pt Battle game, or wait just in case the next game is 5pt War?"
Is that thinking or guessing? I call it guessing. There is no way to "figure it out", you just have to make your guess and hope the next battle isn't 5pt War. If you know the next battle is 5pt War, you can think whether to use your Adira now or save it. If you don't know the next battle, you have to guess.