Mecha, Neo and I also beat 2 of them. But it wasn't a fair fight because they killed eachother. Gave us some time to build up a defence and army.
Oh yeah I discovered that it's sometimes cheaper to build lots of towers instead of units for defence. Because those units need upkeep and will cost more gold than you spend on those few towers.
Too bad I'm not often online when you are. I only meet those who stay up late.