A combustor component of a gas turbine engine includes a refractory metal core (RMC) microcircuit (90) in a liner (72,74) for self-regulating a cooling flow. The liner (72,74) includes an inlet (92), first and second divergent islands (94A,94B), a flow separator island (98), first and second feedback features (100A,100B) and exit slots (102A,102B).