Some random numbers for our parliament... let's say a parliament of 150 seats. This isn't a big country, after all. As for parties... I think we have to have an unclear election result, right? At least to start with. So...
Social Democrats - 54
Popular Movement Party* - 31
Liberal Party** - 23
Pitfarris Nationalist Party - 22
Cooperative Party - 14
Independents - 4
National Patriot Party - 2
Which gives us a parliament without a natural majority and with significant representation for a very wide range of interests.
*I'm assuming that this is Conservative or Christian Democratic in some way.
**I'm assuming that these guys will be fairly right-wing as well.
I agree with you on the order of magnitude you give all the parties right now. This does look a lot like Sweden now, doesn't it?