Alternate rules for Boule

I've got a miniature boule set. I bought it marked down at Edgars... Anyway, it doesn't have the "target" ball.

So, I have six marble sized balls, with which I want to play boule (or a similar game).

So I've devised these rules (they are not yet refined but bare with me):
* Players alternate throwing (this may need to change?)
* The player with the most balls creating the smallest triangle (in circumference) gets 1 or 2 points (1 for having 2 of the 3 "points", and 2 if he has all 3 points).

Throwing last seems to be a big advantage... I'll be testing these rules over the holiday, and I'll give a follow up post on how it goes.