Thank you for your answers Jim and AvshalomBinyamin. It is much clearer now.
I see in Liber 777 that the orders of Qliphoth that correspond to Ruach are the Elements. Is that saying the same thing, or am I making connections that don't exist?
What you are both saying about being in control over the elements instead of them being in control of you, makes me think of what I learned from studying Steiner's antroposophy. He seems to suggest that people have to be in control over the Luciferian powers and the Ahrimanic powers, or else they will control you. Whereas if you are in control of them - they can help you become independent of the Divine to ultimately reunite with the Divine through love - whereby the Divine gets to know itself.
The Luciferian powers being fiery and they can be used to create a creative spark and force things into being, but then the intellect has to be in control and stop the flame before it also devours what has been created and more. The Ahrimanic powers can make things disappear/become invisible and work faster in the background etc. but the intellect has to make sure that the Ahrimanic powers are not hidden from it (or force them back out of hiding in due time) or else they devour also.
Is this a similar kind of thing?
Also, I looked up if Crowley mentioned Ahriman anywhere, and it seems that he only did in Liber 777 as Arimanus - but it is as an Egyptian god (whereas I thought he was a Persian fallen angel type of character) and in relation to astrology - something I don't know much about yet. Do you know if he's mentioned anywhere else? Or what sort of forces he would correspond to in Thelemic literature?
(Sorry for the many questions - my mind is trying to connect everything I've learned so far from other systems of thought to the new language of Thelema, and I guess it's a bit messy.)