I start them at 5.8pH and aerate the mix. I use liquid nutes at an EC of 0.3. Low N from memory so flower nute mix. I adjust the pH back down to 5.8pH every 24 hours as the aeration makes it climb, whick you need it to do. 150PPFD to start. 24/0 light cycle to start.
I use my own setup, aeroponics so humidity doesnt really matter. Temps around 21ish. Dont let the nute mix temps climb too much. Change over nutes every week or so.
Most importantly, total darkness in root area. Any light and it wont grow roots but you can keep em going like that for a while without issues.