My typical strobe setup for Macros
Here is an illustration to describe my strobe setup for my macro work. Its basically a common setup for off-camera wired flash.
A diffuser may be used at times when the above setup is used to soften the highlights or reflection. Here is a series that was done using the above setup. I was actually documenting some shots for my daughter in my education series. The lighting is a side lighting made possible with the side mounted flash.
The above series is a record of one of the ways a butterfly would use its claws at the ends of its legs to cut through petals of flowers to gain access of food.
Here are the photos of the setup:
All these setup have its specific purpose and hope these example setup would provide you with some idea on how you could build up your own rig.