Assigning User based on # of assigned records

It takes some setup and managing, but you can use all native features. I will let you determine if the effort is worth it. It should begin to assign Users to Claims evenly as you add them. Please test thoroughly and enjoy!

• Setup a new table, User Statistics. Create one record, record ID is 1. 
• Create a new relationship, each User Statistic has many Users
• On the Users table, change the field Related User Statistic to a formula numeric and set the formula to 1.
• Create a lookup field for each User, name it "John Total", "Mary Total", etc *keep updated for every User
• On the User Statistics table, create a formula user field "Next User", *keep updated for every User

var number myformula = Min([John Total],[Mary Total]);

If(
$myformula=[John Total], ToUser("john@gmail.com"),
$myformula=[Mary Total], ToUser("mary@gmail.com"))​

• Create a new relationship, each User Statistic has many Claims
  • On the Claims table, change the field Related User Statistic to a formula numeric and set the formula to 1.
  • Create a lookup field for the field "Next User"
• Create a new automation, when a user adds a record in the Claims table, modify records (record ID = record ID) and change the field Related User to the Next User