I don't think so deep sleep may work in smart charging for zukkuSadly from the roms I tried this is first rom where smart charge works at all. I only wish it was better.
Maybe our device is not capable of proper 'smart charge' at all but I still hope it can be fixed somehow. Still better than nothing I guess.
I think there is some external solution for 'smart charge' which will toggle physical connection to device depending on power draw but that would also disable data connection and USB tethering if used.
If you find a rom which has working deep sleep in smart charge on our beloved zuk then please tell me
Btw normal deep sleep without smart charge is working perfectly