I would be helpful to be able to build lists in NXT using the options of having an assigned solictor OR giving a gift during a certain time. 

Another helpful way to build is saying having an assigned solictior excluding those with a specific attribute.

I know you can do both these options as a static query in RE then use that as a base for an NXT list. But the problem with that is that it is static. If someone moves areas and you are using a specific filtered map then you don't have that person.