What rockers are recommended with a comp cam?

Assuming you're referring to the family of COMP Cams that we offer, as shown in the links below, then we generally recommend using standard rockers unless aiming to achieve a valve lift of over 0.600".

COMP Cams to suit V6 Ecotec

http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/CAM601/SubProducts/CAM601

COMP Cams to suit Holden Supercharged V6

http://www.maceengineering.com.au/epages/shop.sf/en_AU/?ObjectPath=/Shops/mace/Products/CAM604/SubProducts/CAM604

COMP turbo cams to suit Holden Supercharged

https://www.maceengineering.com.au/epages/mace.sf/en_AU/?ObjectPath=/Shops/mace/Products/CAM609/SubProducts/CAM609