I'm wondering the same thing myself. I've got my own 5-man botting team, but they are not working very well with Timewalking dungeons at all.. They will get through, but they'll wipe several times each dungeon. The team worked great in Mists of Pandaria Heroics, but that was mostly due to Timeless 535 gear and the fact that they were over-geared for the content.
My current setup consists of:
- Protection Warrior (Tank) - TuanHA
- Discipline Priest (Healer) - TuanHA
- Windwalker Monk (DPS) - TuanHA
- Elemental Shaman (DPS) - TuanHA
- Fire Mage (DPS) - Portal
Warrior was not working out at all until I figure TuanHA is enabling Gladiator Stance by default in his combat routine, that's clearly a no-go for my botting team at the moment, especially within Timewalking dungeons. Windalker seems to be working fine, but the Elemental Shaman has some piss poor DPS...
I'm considering to have 3x Beastmaster DPS instead as most people seems to be recommending that route. One important thing is to ensure you use classes with good combat routines. I'm trying to stick with TuanHA ones as they tend to perform wonders for me, but for some reason I can't get the Elemental Shaman one to work at all... It's not able to finish Bronze Proving Grounds with ilevel 618 gear... I don't fancy Mage either due to it being very squishy.