You've probably missed some option.
I tested this combo out today, and I found that if instead of dash 3c 236a you do just 5b 236a (5b will be at pretty much max range) you lose like 1 meter and 30 damage compared to the dash 3c version.
But since you don't dash, the 236a pole won't be offscreen if you do 5b, so you get an extra pole on oki (two if you plant one as meaty too).
Compare this combo
2b 5b 6b 5d3c 8d 5b jc 2d dj j2c (lvl 2) 2a (whiff) 5cc (first hit whiff) 214a dash 3c 236a (frog hits) dash 6b 5cc 214b oki
3221 damage, 38 meter gain
to this
2b 5b 6b 5d3c 8d 5b jc 2d dj j2c (lvl 2) 2a (whiff) 5cc (first hit whiff) 214a 5b 236a (frog hits) dash 5cc 214b oki
3194 damage, 37 meter gain (and a pole on oki)
Also, since you don't do dash 3c, this combo is easier than the first one, and it's pretty much impossible to drop it (assuming you land the first 5cc correctly).
edit, forgot 5b after 3c 8d