Site Workflow for sending out reminders to different recipients

A way to tackle this is to use a combination of the Calculate Date and Query list actions.  First start off with a Calculate date.  Use this to determine if "Today" is the day you wish to check the list for.  So if you are looking to see if it has been two days since something has been edited, check the box "Use date when action is executed" and place a -2 in the days field.  Store the date as an ISO 8601 date string and your variable will need to be a single line of text.  Next you will perform a Query list action.  Use the filter of modified or equal to your date variable.  Inside the query list, you can pull in all the necessary items like list ID, created by, modified by basically anything that you need to help identify the list item and all the people who you need to notify.  Below is a link that I've used to help create my query list actions. It was created by @jesse_mchargue.   It should be able to help you on all the steps necessary for the query list action.  I use this in several different site workflows that run nightly to send out notifications for various different things.  

https://community.nintex.com/t5/Community-Blogs/Queries-and-Collections-and-Loops-Oh-My/ba-p/82404

Thank you @brianknight. I went through the post of @jesse_mchargue but the issue I do have is that I want to send out notifications only assigned to the list items with only the items that they are mapped on. So far I could not find any solution to this since their name may change or be in different SharePoint groups...

- Calculate today-2 and store in a variable tMinus2.

- query assignees by filtering open tickets and tMinus2.

- remove duplicates from the collection of assignees.

- use a for each loop for assignees.

- for each assignee from assignees, query for ID filtering open tickets and tMinus2 and assignee equals or contains current assignee

- you can build a html table using the build string for this. or a multiline text can also be updated

- For each currentID in IDcollection.

- Using currentID query whatever details you want from the current itema and store in the collection.

- keep appending the details after each query.

- place send notification for each successful inner loop iteration.

this will send 1 mail to each assignee of all the open tickets which is open with no action taken from past 2 days.

You can run this site workflow everyday and need not pause for 2 days.

this should work but when querying a list and filtering by a person you need to use the userID of that person on that site.