>>42952666All 3+ Bar Strikers prefer PF3 to CP2. Generally, PF3 > CP2 > Other stuff, but you should always keep in mind that certain units may benefit from other skills more, like Brendan and Dauntless.
>>42952674Cheryl is really underrated. She has the second best Potion and her other trainer skill is useful for supporting Red, who she outbulks at 4*. Too bad she's absolutely unviable in any stages with physical attackers.