Is is possible to clone a Phone then flash image on other phones

Background

I deal with a lot of galaxy S4 and S5's and spend a considerable amount of time duplicating the settings and installing the same applications on each.

Because of the repetitive nature, I'm sure there is a way of imaging a phone that I have set up then then flashing that image on others. This will save me a lot of time in the future.

Question

I have a number of questions regarding this, hopefully some one could push me in the right direction.

1. What is the best way of imaging the device?

2. What is the best way of flashing the image on a device

3.Are there any implications on using a copied image on multiple phones

Basically is there a standard way of doing what I require?

NB.1 Obviously a different image will required for the S4 and S5.

NB.2 When I say 'best' I mean, least complicated, fiddly and quickest.

NB.3 I'm not that bothered about changing bootloader and rooting, what ever is quicker and easiest is good for me.