Both bodies plus 70-200 and 16-35 See comment #6 for a good place to start.
Try ISO 6400 f/2.8 and SS 1/640 sec. Great lighting and you might be able to use f/3.2 or 1/800 sec., highly unlikely both.
Go to any ISO to keep SS from being below 1/500 sec. A SS of 1/400 sec. will guarantee motion blur.
RAW, AWB or maybe custom depending on the arena lighting, High Speed Cont. AIServo
7DII - Turn Anti-Flicker (ON) if the arena has lights that cycle. It is wonderful - HIGHLY RECOMMENDED.
Center, Center plus 4 or Center plus 8 on the 7dII whichever you prefer. I have tried Case 1, 2, 3 and 4 with no noticeable difference. Use your favorite.
Anticipate the action or your shots will be too late.
Canon 7D Mark II w/Canon BG-E16 Battery Grip; Canon EOS 50D w/Canon Battery Grip; Canon SL1; Tokina 12mm - 24mm f/4 PRO DX II; Canon EF 24-105mm f/4L IS; Canon EF 70-200mm f/2.8L IS; Canon 70-300mm f/4-5.6L IS; Sigma 85mm f/1.4 EX DG HSM; Canon EF 300mm f/4L IS; Canon EF-S 18-135mm f/3.5-5.6 IS STM; Canon Extender EF 1.4x II; Canon Extender EF 2x II; Canon Speedlite 430EX II Flash
Image Editing Okay