I can’t remember the last time I played darts, but I do remember briefly thinking that where you should aim depends on your accuracy — and now Ryan Tibshirani has run the numbers:
Amateur
Target the inside border of 8 and 16. Even If you’re off, you’ll still get decent points. 
Above Average
Focus on the triple-19 ring. It’s your ticket to an excellent score. 
Godlike
Zero in on the point-tripling arc in the 20 wedge and expect direct hits.