A good player has cleaner decision making/flash execute combos. Wsreborn does the basic stuff perfectly but overall riven has much more mechanics depending on lethal threshold (flash executes). Overall I would not recommend it and you are better off with a skillshot champion or adc.
riven is decent with scripts but her ability is limited with scripts, i reckon better champs with scripts would be caitlyn, lee sin and zeri, maybe even cassiopia