I found https://photo.stackexchange.com/questions/3759/how-can-i-use-wide-aperture-with-fill-flash and https://photo.stackexchange.com/questions/54627/how-can-i-use-flash-with-large-apertures while trying to find a solution for using a large aperture to get DOF with the flash setup I have. 

The answers seem to suggest that its difficult with standard equipment, but possible with a few options, one of which is highspeed sync, but according to an answer 

> "This does, however reduce the power output of the flash, by roughly
> two stops, so there's a game of diminishing returns going on."

My question is, is the use of a large aperture common (or not) when using flash in professional (or amateur) photography.  I am curious as if it was a common technique, I would think there would be more options available, or more equipment offering it as standard (or is this a false assumption)?