100 ISO is good, because you have plenty of light.
I would tend to use Tv mode for action shots, because you want control of the shutter for sharp or blur. However that does come at the expense of background blur because you cannot control the aperture. That's where panning starts to come into it. but not for nearly head-on shots like yours.
Some really canny guys actually go full manual! That is great if the light is not changing, but will be a real pain if it is. I often shoot racing boats and kite surfers, so I am frequently panning through downsun toward upsun. Makes manual very tough. I prefer to let the camera take care of "the other part".
What gets me with full manual is that you still have to get correct EV, so you are still simply juggling.
As I said, ND filters are the way to go iof you want slow shutter and wider aperture in bright light.