How does faction loss works?

[Goregasmic]

Yeah that's what I thought so this is why I expected a hit for casting gift of pure thought on a cleric. Seen the particles transfer to the whole group, namely a paladin MT currently fighting and I got no hit. So I guess group buffs faction hits only affect target (cleric) and if cleric doesn't take part then you're fine?

Group buff dynamic could be tricky but I've dumped C2 on shamans in combat and sometimes I get a hit and sometimes I don't so I'm puzzled as to what exactly triggers a faction hit.