I think most of them concentrate on specific threads. Evi-san seems to create mods for their specific interests so that they can hold down their areas. Like for cornballer is in tv threads so he mods those. Aeana in jrpg and rpg threads in general so she mods those. And then they fill in gaps by paying attention to any new thread, its activity, and whether or not a bomb will go off.
Edit: fucking phone.
Definitely see
Aeana in (J)RPG threads
Cornballer in TV threads
Nirolak in Gaming News threads
bishoptl in Race threads
Stumpokapow, Opiate, besada, Cyan, charlequin and Mumei in Social Justice threads
duckroll in anime threads
Kagari in Final Fantasy threads
EatChildren in Mass Effect perv threads
Wes in Football threads
Kabouter in Paradox games threads
ThoseDeafMutes in Real GAF and Fake GAF threads
Minsc in Baldur's Gate 2-type threads
Teknopathetic in about one thread per month
Then you got most of the others that to my mind are more general