To add...
In your first mythic run you ran unleash life on every boss which is bad enough but throughout the 3 mythic bosses you killed you are looking at a combined 16 minutes. You used Unleash Life 11 times....Some fights you only used it ONE TIME. You should've had atleast 60 uses on it. Throughout the 3 bosses if you are going to run unleash life.
To top that off you run Ancestral Guidance but you didn't use it once throughout the 3 kills. Not once when you should've used at least 7.
I have no more interest in reading your logs into more detail at this point you don't know what you are doing and you are holding your guild back. I'm not going to waste my time any further if you don't want to put in your time to research your class with the many many sources at your disposal... You aren't a new player you been on mmo-champ since 2012. Step your cooldown usage first, use the right talents then come back and ask what you can do a little bit differently in your spell rotation then we can be able to help you.
http://www.icy-veins.com/
https://chainheal.com/
Educate yourself man you are a mythic raider, act like it.