Well, HCG is not AAS but it will keep your testicals functioning and help make pct more effective and efficient. Some guys like to wait until their cycle is over and do more of a Scally Power PCT (google it) but to me it simply smarter to use it all along as Austinites explaines.

If you were starting TRT with no plan to restart then sure you could wait on the HCG and dial in with T first. But you plan on restarting so mimicking LH function via HCG is the better way to go. Plus it helps maintain downstream hormone production. You won't have any bad sides to minimal HCG usage.