Zoas are pretty tough and will tolerate changes far better than other types of corals. In the wild it is not uncommon for them to be exposed to the air during low tide.
I used a small plastic container to float them in my sump or in my frag tank and slowly add my tank water to them. The drip method IMO
can take too long and allow temp and PH swings causing more stress than just getting them in the tank. I always float any new coral in my system to get temps equalized and then put them in the container and add water for maybe 20 minutes and then into the tank they went. I did drip in the beginning but found it to take too long and not as effective. Just my experience and $.02