If you bowl anything less you’ll be better off spending time on the other aspects of your game than trying to get that small % gain.
Below 85mph you have to be 3 dimensional (3D)
You know deep down if you bowl rapid. I mean proper pace not Instagram pace. If you’ve not been the fastest growing up, trust me you’re not magically going to be the fastest past the age of 20!!
Spend time working on your batting and fielding. You can still be really successful but work on become 3D. Become the 3 dimensional player not that bowler who spends 99% of the time trying to improve 1mph. Going from 79 to 80mph. Those speeds will never allow you to be the 1 dimensional professional cricketer
Honesty drives better performance
Note: That’s me scoring 105 against New Zealand in 1999.