I've read mixed stuff on pH'ing foliar spray and from what I can gather it appears to be bro science. Anything out of the tap should be fine.
What medium are you rooting your clones in? It is recommended to match the pH of the medium when cloning, so if in coco 6.0
Nutes should be flower nutes until roots have developed, low N is key and no stronger than 0.3 EC. Keep light to a minimum so if outdoors no direct sunlight. Window sills out of direct sunlight seems to work pretty well indoors. 24hrs light works also but low levels, above 75 PPFD but below 125 PPFD to start if you can accurately measure it.
Rooting hormone for softwoods (purple) seems to help but it must be applied immediately on taking the cutting to help avoid problems. Temps of around 20 to 25â°C and use domes if in soil or coco.