i do 50%-70% rh for veg, and 35%-50% rh for flower (relative humidity=rh). then 70-80 degree day temperatures for veg and flower with no less than a 10 degree temperature drop and no more than a 15 degree temp drop. Any more or less your plant is using way excess energy to regulate its own temperature, instead of putting it towards growth. the humidity during veg doesn't matter its when the buds dense up you have to keep it @ 50 degrees. also bad to have a fan constantly on the plant, it will make the plant put energy into keeping the leaf moist. you want it oscillating over it to keep it cool and move it around so the lower canopy gets light too
clones are kept in a dome with a shit ton of humidity (mist 2x a day, slowly work down to 1x a day) and refreshed with new air as often as possible. i like to keep a cup of water with an air stone in it so i'm not worried about the air in the cloner getting stagnant. ready rooter cubes work great and allow air+water to the rooting spots. Sometimes roots poking out on the 5th day. when i see roots i transplant into its new medium and keep it in the vegetative conditions. little fan at first then more and more