Using galaxiex's chart, I took the servo and lever specs and worked out some values for various combos by multiplying the servo apply value by the lever ratio. Not sure how accurately this reflects anything however: (servo / lever)
G / E: 3.75
H / E: 4.33
R / E: 4.59
G / F: 4.70
D / F: 4.78
P / F: 4.83
H / H: 5.10
H / F: 5.38
R / F: 5.70
Looks like an H / F combo would be quite a bit more aggressive than the typical R / E, and nearing the known limits of the R / F combo, so I think I'd either want to stick with G / F, or go with H / E? I have no idea how these parts work together to be able to know which combo would be more desirable. It's nice to have options though!
I think you're on the right track.
I have not messed around with different servo and lever combos to know what works and what is on the edge.
I do know that the more aggressive levers like the H, F and FF apply more force, but are slower to "get there" due to the low ratio.
We are talking fractions of a second of course, but that can be an eternity inside the trans, in relation to what else is happening.
The 2 - 3 shift has always been kinda "tricky" since one friction element has to release (the band) as the next one (the high clutch) applies.
Get the ratios and apply/release timing wrong and you get a bind or a flare on the shift.
Band adjustment comes into play here too, tho to a lesser extent.
The G/F or the H/E look good to me too.
I have the R/E in mine, but have not driven it yet.