Well, you can if you want to. We just do not recommend it as it creates asymmetrical links. If you have a high-power node A and normal power node B, then Node B will always hear node A, but when it tries to transmit to Node A, it will fail as it transmits with just normal power. If Node A transmits with high-power and Node B hears it, B might choose A as it’s parent, then when it’s time to relay data through the mesh, B won’t be able to speak to it’s parent and the mesh-link will be broken. Thus, the mesh and routing structure would behave in unpredictable and unreliable ways.