Just finished my first two War of Spanish Succession French units Royal Italien and Saintonge. I've a soft spot for Saintainge as I already have it in my French army for the AWI, I just picked the option of a lighter blue
As for Royal Italien, it is a unusual brown coated unit so it adds a nice contrast to the mass of the French army.
I'm not working to any particular order of battle but I certainly want a number of units to have participated in the classic 4 battles of the WSS, namely Blenheim, Ramilles, Oudenarde and Malplaquet. Saintonge was at all four and Royal Italien at three.