Best time to add nic

I usually make 500ml batches and add the nicotine after the steep and on a per use, 30ml of juice at a time.
Any benefit to the way im doing it?
Or should i just add the nic during the making process and be done with it.

Original source: https://www.e-cigarette-forum.com/threads/best-time-to-add-nic.964833/