I think trying to find the meaning of Alu through etymology alone is strenuous. I’ve studied rituals from India, especially the timeline from Vedic to medieval times. The ritual is usually passed down through priests or in some lineages through gurus. If they die, a lot of the culture and knowledge dies with it. If you read the Vedas and then you see a vedic ritual, you just know how much difference there is between the dry words and the actions that infuse and inspire.
That said, Alu might be something along the lines of Soma, which in Vedic ritual is an intoxicating beverage to meet the gods.
Hackers these days... :P
https://www.amazon.com/ALU-Advanced-Guide-Operative-Runology...
Or if you want more entry level information or written, exploring wikipedia is fine.
I wasn't able to find any sources of his "con artistry".