  We propose a versatile strategy for numerical renormalization group solution
of general channel-mixing Kondo and Anderson models beyond previous reach,
opening the door toward broad applications in protocol non-perturbative
machineries, such as dynamical cluster approximation and cluster dynamical mean
field theory, for strongly correlated electron systems. We illustrate the
strategy by investigating the quantum phase transitions in two quantum impurity
models with cases untouched before.
