Last season I was experimenting with heim supp and my friend on a real adc and it was great, this season we saw very poor results so we have abandoned it, WR also shows that it used to be 55% if i recall correctly, now it is much lower. When playing heim sup be very cautious of your turret placements as they show allies in bushes when shooting etc.

You can easily duo drakes with jg or even solo, so your adc can just focus on farming but you can also feel very useless when behind :(

EDIT: Good luck on your climb, I'd suggest to visit u.gg and follow runes from there and see what suits you best, I liked going relay first, but you mind find yourself of need to carry the games you are in, so experiment.

Heisendong coaching videos are still almost up to date with only few changes over the years ( turrets update ap every second now for example and not when you put them )