Hey Community - 
Hoping someone can help me on a workflow I'm stuck on in Lucidchart where I need a bit of complex conditional logic applied.  

Here's the scenario:
1) New client is sent agreement and sent invoice at the same time
2) The agreement must be signed AND the first invoice must be paid before moving onto the next step
3) If agreement is signed but invoice is not paid I need reminder email to go out at a specific time about just the invoice. I need this to loop until after a 3rd reminder email is sent and then it would go to a "dead queue." And of course once invoice is paid the reminders would stop.
4) If invoice is paid but agreement is not signed same basic process as in #3.

Obviously I could create a ton of decision diamonds for all of this but I believe there's a way to depict it through setting it up as an iteration?

It's been years since I last had to do this and just cannot remember how to lay it out. If at all possible I would love a visual on how this would be setup.
Thanks in advance!!!