Sophie is love, Sophie is life. Don't underestimate her healing on current content, especially if you lack a feng shui user. Her regeneration doesn't sound like much on paper, but across multiple units it adds up quickly and more importantly it smooths out your healing distribution--in Aigis War units often die because Priests have relatively slow healing intervals and they struggle to cycle through multiple targets. With Sophie out there soaking lich bolts and sponging away minor bruises it becomes a lot easier to keep your primary healer focused on the biggest problem. Now that my team is relatively mature Sophie and Iris are often the only sources of healing I regularly deploy because 36 health per second and Iris's AW ability tames most of the AOE damage I run across and running an extra dps instead of more healers means that I don't have to tank heavy hitters nearly as long.