I... I don't even know what to say...
Thanks, first of all! Secondly, I don't think I should do all summons (way too many to count), but so far I've been focusing on the common ones (Ravana isn't exactly popular but will be covered in Part 2). However, people have been asking for more obscure summons, so if there is enough demand, I will happily propose the idea to write about the more obscure ones like Carbuncle, Belias, etc.
Edit: Looks like the second one has been published already!
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They're included in the second half, actually!
Awesome to know!