Strobes are much better at night, than during the day. During the day rotary is the way to go. However rotary lights draw a lot more power than strobes, so depending on your alternator strobes may be the better choice.
We run all strobes on our trucks. I can tell you no matter how many lights you got on a truck, people are still going to cut you off, back out in front of you, go around you, get to close to you, ect.