I like running them first light to take advantage of the glow and because I can pre-rig them to get them in the water quicker than real meat for that early, aggressive bite. Also, I find them easier to tune to get the perfect roll.
Keep an eye on the rod though or check it frequently. A short/missed strike will bend the rocket the opposite direction and ruin the roll.
Dalmation and Frog are my favorite patterns.