N.gin labs -> don't use crash, use Coco
Polar pass -> coco
oxide -> coco
slide -> crash or coco
turbo -> don't use coco -.-, use penta, and sometimes polar and pura are better than this one here
In every track is better use saffi for best laps, but in some u will never use cos it's impossible -> dragon mines, blizard, roos tubes,
Then there are the tracks where just if u want can use saffi -> HAS, Crash Cove, Tiger, Coco park, Dingo, etc
And there are the tracks where u must use saffi obligate for best laps -> N.gin labs, cortex lap
hope to be usefull 4 u, the techs and the another things u can find in LinkZer's guide