From my experience, Ascension isn’t something that you just “attain” like that, it’s a continual process that you work on by a variety of methods. There is no set ritual or method to get there, just as in life there is no concreate way to obtain success, you work towards it by using everything at your disposal. There are a lot of ways you can work on your ascent, from working on it yourself through mantras, yoga and manipulating your on auric field to increase energy. To working directly with spirits that help you along your path, like you say you can work up the Qliphoth, or you can work on the 3 godlike powers and attain ascension through that.
The best piece of advice I can give is to summon up spirits. It sound simple, but conjuring up a spirit and getting advice from it is the best way to work through it in my opinion. Spirits can bring about changes in the physical world yes, but they can also bring about changes in your body and energy. There are numerous entities in KoF that specialise explicitly in Ascent work, to name a few: Deggal (he is one of the first spirits you should turn to with ascent, he “comes enveloped in a divine light and will surround the magician in a similar light, which will serve to manifest ones greatest qualities and unleash godliness”), Enkidorat (Grand Angel of ascent), and Pontimas (guides the magician in clearing karma and negative blocks to allow you to push forward with ascent).