I only use Swiftcast with Raise and Stoneskin, sometimes. Tried to heal with Swiftcast but it's useless.
Remember that when you Swiftcast, you just have the effect at the beginning of the cast instead of the end of the cast, but the recast time is still there.
So using Swiftcast+Cure>Cure is like using Aero>Stone, you have to wait 2 times the recast to heal again.
Hope this helps