I have raced single L1 ranks against geoo in Dos L1, but never the entire game. Good perseverance.
Depending on seriousness, you might memorize optimized routes for nontrivial levels. Painful time loss on Kessel, it's impossible to gain that much back with cool tricks. Good that Kessel stayed the only reset-heavy level.
Be bold. Don't pause to think. Instead, framestep-back if you have thought too long. This doesn't seem like much, but it adds up in every single level. You like precise skill assignments, but in real-time attack, you can't afford to pause for most.
Fast-forward is too slow for running. You might want something in between fast-forward and the 10-second skip. Make a 1- or 2-second-skip. NL allows fine-grained control.
The 10-second-skip is almost too fast; It's for long walking, builders, and end-of-level mashing. You look like you have a good feel for how long the 10-second skip is for walkers, very nice.
Don't bomb extraneous blockers at end of level; press Esc. Or instead mash 10-second-skip, nuke with hotkey, and mash 10-second skip. In general, don't click on the panel; use hotkeys for skill selection. The default NL keys are horrible, spread out all over the keyboard. Consider making your own layout. No matter what you invent, it will be better than the default layout. Learning a different set of keys will nuke your performance at first, it's your call whether re-learning is worth it.
-- Simon