Hey few suggestions.
1. Why not just all go into whatever mode you wanna play separately with region on. Nobody else will be in Haiti so all 8 will end up in the same match anyway.
2. Take the best host out of your group and have him go in first
3. Australia guy will have no countries that match up. So the only way to ever get him in with you is to have regions off. Get your invites sent to 2 separate groups of 4. Then one group starts searching for whatever mode and as soon as they start search tell the second team waiting to start searching that same mode...give a NOW text via chat. Usually it will team you up, if not try a few till it works.
4. The best way to make sure clan battles happen is to go to the other clans website or vice versa 20 minutes in advance to get all set and rules set. This will make it easier for both teams to know what's up. You guys should really get a website made with chat. There are free ones out there. [RS] has our own site and it was free and works great. You can come check it out to see what it Is and get ideas for your own. Our website is www.redscreenclan.webs.com