So for context I'm a 17 year old sports photographer who started last year and I'm currently using a Canon R7 with a 70-200mm mkii f2.8 and a Sigma 150-600mm f5-6.3 and I don't know if I should buy a R6 or sell my 150-600 and buy the Canon 100-400 mkii. I've also been looking at a widen lens like the 24-70mm f2.8 I feel like it would really be good at basketball but I really don't do very much stuff that's up close except for basketball. It would be nice having a longer Lens that's better in low light for soccer games and football but I was thinking I could put the R6 on my 150-600 since it does better in low light.

I'm really just looking for help deciding what to buy next so please give me your thoughts