Thank you very much for your suggestions, I appreciate you taking your time and helping me with deck-building. I managed to snag Diedre, Kana, Mikoto, Bridget, and Emma, as well as a couple of other cards. In addition, while looking at the CorrinF Deck in the first post, I went ahead and purchased Felicia B06-070R. Previous deck builds of CorrinF also featured 2 copies of Flora B03-085SR, so I also bought two copies(Not sure if two copies is enough). From your suggestion, I took it that series 6 was the best booster box for CorrinF deck, so I bought 3 boxes. Are there any other booster boxes that you think would be worth buying?
There is one problem I have though, I can't identify the four Nohr cards in the top right hand corner, and was wondering if they were essential (Tuvillo's Set 7 Metagame. CorrinF Post). In addition, from what you said, it seems that Dierdre is a meta-changing unit.
Are there any other cards similar that are similar to Dierdre in being extremely powerful cards?. I bought Nino B07-039SR, and Florina B07-015SR as it seems they were quite heavily talked about and were powerful cards for Purple decks. Are there any similar cards for other colors in which they standout as being top tier cards? Any SR cards I should keep my eye out for, as buying SR cards online is more difficult and expensive? Once again, I appreciate you taking your time and educating me on this matter.