For anyone interested in optimising this further, orthographic (letter-based) cursive shorthand systems are the answer. I personally only know part of the Melin system[1], but there are variants designed for English as the primary language too. (Melin is of course perfectly usable with English also.) The flow of a cursive shorthand system is unmatched by anything else. I highly recommend learning enougnh to experienc…
The point of the phonetic systems is that you don't have to ‘spell’ words at all: what you say is what you write.
(Then there are briefs, of course, but those are for additional benefit.)