I am looking to equip my air-medical transport helicopters; what configuration do you recommend?

Warrior lite with Extra Power battery. This configuration will allow you to operate during back-to-back calls or bedside (if needed) without worrying about the battery capacity (up to 3-5 liters with a single charge and 180-270mL/min, subject to incoming fluid temperature; 1.1kg).

If you are space or weight constrained, the Warrior lite with the lite battery can also be considered (up to 1.3-2.5 liters with a single charge and 170-250mL/min, subject to incoming fluid temperature; 0.8kg).