A lot of medicine mnemonics which I have seen are acrostics: the first letter of each word of a sentence is meant to be a prompt of the first letter of an item of information.
However, once you have a lot of acrostic sentences, the specialness of the first letter of words reduces a lot: the method becomes less potent. So I think that a memory technique that prompts two letters is better: an acrostic where the first two letters are useful as prompts (per word); or
an imagined scene where all items in the scene are two leeter prompts rather than one letter prompts (probably using the AA to ZZ heroes from the heroes article mixed in with other imagery relating to the topic itself); or
a memory of a loci place where each sequential loci place has a two letter item imagined at it. E.g. Places 1000, 1001 and 1002 can hold one or more AA-ZZ heroes to prompt recall of concepts.
I also explored the idea that a complex word can have its first several letters be expressed as a monster - see the two Monsters articles. So you could be imagining a pointer to loci 1000 in a story involving that monster; or you could imagine a scene involving the monster and the AA-ZZ heroes, etc. relating to the keywords you want to remember when describing that topic.
Actions can be spelling prompts as well. I have written how 900 of the 1000 actions can act just like the 900 AA to ZZ heroes in representing two letter prompts; and, if colour fill is meaningful too then a third letter can be represented in the action. So a monster doing a particular action can represent two or threeletters of a prompt.
A lot of Greek words are used in medical terms; so it is good to have a visual mnemonic for the frequently occurring Greek word parts. I know that 'ambi' means 'both'; so maybe a visual of a 2-headed dragon could mean ambi: the 2 heads are the 'both' concept. Or maybe some of the Ancient Greece Greek names are close enough to a medical Greek word that the image of an Ancient Greece person suffices to mean the medical Greek word.