Managed to 3 star everything today. I didn't think I'd be able to 3 star the last one (I could farm it on 1-2 tar runs ok) but a slight change (and a look at Key Kii's video) got me through. Flamel is truly amazing on an open map like this!
Cheers to the Devs for 4 star challenges. Those should tip me over the top (plus if we get an event next week) so total SC spending this month is 100.
Now I'm at my next predicament. I have what I need to get Anya. Do I max level Doriana first or is there no need?
Edit : comments on Doriana's page on the wiki had the answer. Need to max level.