I agree with Yondering in that there is a lot of variance with Glock triggers & that does sometimes require different parts to get them all close to the same point.
But nonetheless, the starting point for me is always to polish parts, G3 smooth trigger, Zev V4 or Glockstore Double Diamond connector & a 6 lb competition trigger spring...............yes, I know a heavier spring sounds counter intuitive, but it almost always makes the trigger more crisp.
Eventually all mine turn out to be around 4.5 lb with a shorter than stock rest and a more crisp feel.
The only thing I've done on a G5 gun is to put a new connector in & it's the most crisp Glock trigger that I own.
MM
