I agree, the more songs released, the better, but I believe Party Starter is one of Will's best lyrical song and would get a lot of airtime, so it should be the third single.  It would be cool to see Snoop and Will in a video together, but Party Starter is a better song.  I still say go with the approach of releasing Tell Me Why first.  Then, like a month later, release Party Starter, L&F, and Pump ya Brakes all at once.  That way, Big Will would totally dominate.