I can absolutely bury my drummer when I run my 810..... But what good is that? If the 210 gives you a good mix with the drums, I don't think trying to go beyond in order to make up for a lack of pa support very wise. At that point, you aim for a good, unassisted mix. If that is not enough volume, then the venue will have to address it next time around. Besides, in my experience most pa systems that can only support vocals really aren't even good enough for that, and struggle to keep up with backline only trying to carry an outdoor gig.