AWA Chat assignment rule - Assign by least capacity

[Oliver Harding]

In the AWA Chat assignment rule, is there any way to assign to the agent with the least capacity? 
This would enable us to have the minimum amount of agents using chat as possible rather than giving lots of agents one chat. 

Alternatively is there a way to create a custom assign by value.

[Mark Manders]

So you want the agent with the least time, that is already not finishing anything, because he is constantly being bothered by other work, to also get all the chats? Why implement chat at all? This will give the worst user experience.

[Oliver Harding]

We do not have capacity to take a large number of agents of phone support to dedicate to chat alone, ideally one person would take up to 3 chats at a time with others available as a backup only if they are at capacity and so on if that person takes 3 chats.

[chadtardif]

Yes this is possible, but not OOB.
We're doing it using Skills and a Flow that adds and removes our analysts to that skill as items come in.

[Oliver Harding]

Could you share some detail on how this was achieved? 
We created a custom availability status to cater for this missing functionality but its not ideal