First of all, even if we're only talking about same gender support trios (otherwise there are a whole lot of "trios"), that's not true: Íñigo, Owain and Brady are such a trio as well. And how is it effective in any way? You can only fight in Dual Support, the third person doesn't help. And that's still no reason to not think they're boring^^ ("triple support trio" eh, what?^^)