There is no one-size-fits-all answer to this question. It all depends on the situation and the components you need. Components grade 1-4 should be obtained using an alternative method or method of exchange, as they are easier and cheaper to exchange, as well as almost all of the resources of this type can be obtained using an alternative method, without exchange.
Components of grade 5 will not be so easy to exchange. Their exchange rate is exorbitant and on top of that, almost none of the resources of 5th grade can be mined by alternative means, since they are simply absent at the notable locations. Such resources must be mined directly.
