How should we use algebraic notation in chess variants with very many different types of pieces?

Solution #1: Give one unique uppercase letter to each type of piece. The first problem is that many pieces start with the same letter (for example, aanca/alfil/alibaba/amazon/antelope/archbishop, camel/cannon/centaur/chancellor/crab, general/giraffe/gnu/grasshopper/gryphon), so either most pieces would have a letter that is not the first letter of their names (such as N for the knight), or we would have to invent completely new names for most pieces (we wouldn't be able to use the names that they are usually known by). The second problem is that this solution wouldn't work if there are more than 26 different types of pieces, since there are only 26 letters in the alphabet.

Solution #2: Give two uppercase letters to each type of piece. For example, QU would be the queen, RO would be the rook, BI would be the bishop. I assume that both letters would need to be uppercase, otherwise we might confuse them with the letters that represent the file (a to h), which are lowercase.

Solution #3: Give two uppercase letters to each type of piece, except for the most common types of pieces which should have only one uppercase letter. For example, Q would be the Queen, R would be the rook, B would be the bishop, AL would be the alfil, AM would be the amazon, CA would be the camel, CH would be the chancellor.

Solution #4: Don't use algebraic notation. Use coordinate notation instead. For example, instead of saying 1. Nf3, we would say 1. g1-f3.

Share your opinion.
What is the best solution?
What are the pros and cons of each solution?
Are there other solutions that I didn't consider?