Mariah heals the group with a burst of positive energy.
AoO: (1d20+8) for (1d4+2) + 1 point of electrical damage.
Swift: cast Stabilize for 26HP of healing. Should catch everyone including SA1 and SA2, who need a DC17 Will save to negate. Excess healing goes to temp HP.
Standard: if SA1 is dead after the Stabilize, total defense. If not, cast Cure Minor Wounds on it for 26 damage, DC15 Will save for half (should kill it even with a save).
Move: Tumble to D1 (auto success).