We used a Canon 5DS with a 100-400mm lens (and a solar filter except during totality), zoomed out all the way, for most of our the stills. Since there were sunspots at the time, the partial phase photos have plenty of those in them. I used my Canon SX70HS for video, though that proved a problem when I realized that the video doesn't do manual focus and it shifted mid-take. My avatar image on Tiltforums is on of the "diamond ring" images (with the 5DS) from just as the sun began to reappear at the end of totality.
For this year, I now have a Canon 5R with a 600mm fixed lens and accompanying solar filter; we'll use both that and the prior 5DS/100-400 setup, each on a tripod. Note that during totality, the sun's movement is less than the width of the frame with modest zoom lenses if the image is properly positioned at the beginning of that phase - - just "lead" the shot, i.e. position it so that the eclipsed sun moves through the frame. That way you don't need to adjust the tripod again until after the sun reappears. PRACTICE that with a solar filter on before eclipse day!
BTW, solar filters come in a few different densities, generally ranging from 16.5 stops to 18 stops. This means that your exposure / f-stop / ISO settings during the partial phases will not be exactly the same as any guide you read unless you're using the same filter factor as the guide does.
You should also decide what you want to image in your shots ahead of time. Fast shots will show prominences; medium shots will show a blend of prominence glow and the inner corona; longer shots will show the corona further out. You can look at samples and their different settings online. It's more of an aesthetic choice - - some of each or concentrating on a particular subject. Personally, I like the prominences better; my wife and I will probably "divide and conquer" with me taking more fast shots and her taking more longer exposures.
Finally, DON'T FORGET TO LOOK! (With solar glasses on when any of the sun is visible.) Don't "just" take photos, enjoy the moment live, too!
Good luck to all of us re clear skies that day wherever we are!