Custom Automation Rule Help

[Ryan Noel]

I've been using Automation Lite to set up multiple things for our Servicedesk, but am still struggling trying to make one of them happen. My last post: 

https://community.atlassian.com/t5/Jira-questions/Automation-Lite-Rule-Help/qaq-p/817281#M263386

Details:

2 Custom fields - Impact, with options 1-4. Urgency, with options 1-4.

When these fields are changed, I want them to change Priority (options 1-4) based on a simple 4x4 matrices. 

I have tried multiple setups, including those suggested by Alexey, who has been quite helpful, but to no avail. At one point all rules were firing at once, now I can't get them to go through at all. 

I would like to start from scratch and follow some basic instruction from someone with experience in Automation Lite. 

Again, upon editing Impact and Urgency, I would like Priority to auto-update following a 4x4 matrix.

Thank you in advance,

Ryan