hi guys, everyone typing in greek might already have a copy of something like this, but just in case, here's a list of everything in the SPIonic font:
note in particular that there's 2 versions for all accents, combinations of accents, &c: one for narrow letters (like iota) and one for wide characters (like omega). so e.g. you'd always use ~, not =, over omega. also the combinations of circumflex with breathings are useful.