Actually, I only needed a single Seraph Robe for her HP and a single Speedwing for Part 1. By the time she was a LV20 Light Priestess, I'd used 1 Energy Drop, 2 Speedwings, 0 Secret Books, 0 Ashera Icons, 0 Talismans, 0 Dracoshields, 0 Spirit Dusts, and 1 Seraph Robe. I'd used Resolve for Part 1 and Paragon for her Part 3 and 4 chapters along with using BEXP to balance out her unfortunate level-ups. She ended up maxing out every single stat. I think it's just my luck speaking, since I haven't had a lucky streak in any game other than Fire Emblem.