I can only give my opinion.... Is it ever optimal to consume moderate/large amounts of alcohol while trying to build muscle, no.
If you are on cycle and it includes anything that is liver toxic, personally I would avoid placing additional unnecessary stress on your liver. Is it going to send you over the edge and cause any real major harm, very unlikely, but why risk it? Say your average oral cycle is 8-12 weeks? If you can't withhold from alcohol for that short amount of time, you might want to revisit your mental willpower. All just my opinion, take it for what its worth.