HELP...Experienced growers opinion needed

Me and my mate are having a heated discussion about what the most important factor is regarding growing weed.......What does everyone think the 5 most important factors are when growing???

Nice 1
Kidd

Air
Water
Light
Temp
Humidity

Making the enviroment right comes first

PH
Light
air
temp
water

thats what i said but i think he's a bit drunk and in an argumentative mood....LOL....nice 1 all....PEACE