Hey there 
Not sure if you’re still looking, but my guild, The Collective is on Barthilas.
We currently have an AOTC raid team (Wed/Mon 8:30-10:30pm aest) and a mythic raid team (Wed/Mon 8:15-10:30pm aest) - subject to tryouts for the mythic team.
We also run more casual raid runs that are open to everyone (providing you meet ilvl requirement), and have lots of members that run M+.
Link for our current recruitment post → [A/H] Barthilas <The Collective> Tanks/Healers/DPS
If you have any further questions or wish to discuss further, feel free to add me on discord: cynters