Frost/Fire Mage LF Log Review

[Cellice]

Hi!

I am wanting to get my logs reviewed to see what I can improve on as my guild goes into the later M Ant bosses (6/11M atm). Below I have provided log links to a few mythic logs from the first 5 bosses (No logs available during Christmas week due to vacation). I do know that I need to start implementing shimmerlancing into my rotation, but if anyone can provide any other pointers I would greatly appreciate any advice! Thank you for your time looking at this and happy raiding!

Notes:
For Portal Keeper I have a lot of casting down time due to being the assigned person to grab a Green Pool, Fireball, and 2nd purple pool

Logs:
https://www.warcraftlogs.com/character/us/maiev/cellice

Guild Logs:
https://www.warcraftlogs.com/reports/MwTNRgvqfL7yD3zG (December 14th First 3 bosses)
https://www.warcraftlogs.com/reports/ZC ... Y#fight=17 (December 17th Portal Keeper)
https://www.warcraftlogs.com/reports/kCD8JqN23MQanhbw (December 20th First 4 bosses)
https://www.warcraftlogs.com/reports/68 ... X#fight=25 (December 21st Portal Keeper)
https://www.warcraftlogs.com/reports/MG ... fight=last (January 1st Imonar Kill)