So, my recomendation is that you start to level up key units for the next event, specially being a star one. Good thing that you already have at least three AoE Magic damage, because that will be important for G map. You can find some videos on wiki. Looks like 3rd witch can help (Adele) and probably a 4th or 5th healer for the 70/6 map. http://millenniumwaraigis.wikia.com/...d#Video_Guides

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Oh, some more levels on Marius/Zola may be very handy too