How are you guys pulling off grinding mobs with > 5 toons?

2 groups of 4?
1 Raid of 8?
2 groups of 5
1 raid of 10?

Was messing around trying to plvl my 2nd battle.net account and was having issues with the tagging system.
I saw the legion tagging post from like 2016 mention hypothetically you could tap up to 9 (grp of 4 + grp of 5), but raid tapping is bad mmkay.