Thank you for the helpful information in 

However, I am trying to use a custom DS tag in tables where recipients replicate in the event there are multiples. Your advice of “Make sure to append {r} for multiple recipients. (i.e dl.SignHere.{r})” works well for a static number of recipients, but does not when they need to replicate. I am using a named range excel file for the connected data on the templates to accommodate the replication for the standard Nintex and DS tags that is working very well. 

Or is it possible to add the custom tag to Recipient Sign Options so I can assign it to the different recipients that way? I was able to add the new value to the Sign Options, but it is not displaying in the “Available Sign Options” under the recipient.