Vader Lead Raid Squad

I am going to be giving my next Zeta to Vader. I was looking at how I want to build the squad and initially was thinking the basic empire team of Vader (L), TFP, EP, RG & possibly Boba. I have thought further on it and am now strongly considering Dooku instead of EP. My main question is will any bonus attacks from Dooku also proc the Vaders L turn meter reduction or will it only be the first attack?