Average golfers never want to leave themselves above the hole; the fear of being aggressive on downhill putts has burned into their memory the agony of 3-putting.
To alleviate some stress and help you to make a few more of those slippery downhillers. a lot depends on mindset. Try treating downhill putts much the same way most amateur golfers treat tap-ins.
By imagining a hole eight inches in front of the ball and on the intended line, you can trick yourself into hitting confidently to a “hole” you know you can make it in, resulting in a stressfree approach.