There's a diminishing return to the benefit of high DPI, over a certain point it does practically nothing more.
3200 with 0.1 in Valorant is plenty enough, the difference to 1600 with 0.2 hard to distinguish.
You should stay below 1 pixel/count though (which you are), other than that the most important aspect is that the cursor speed also works for you. Very few games support separate cursor sensitivity, so if you try to play with say 16000 DPI the cursor will be insanely fast and very hard to use in the game.
The only real issue is when you play with 400-800 DPI and high sensitivity.