Using the right keys:
It takes a few days to get used to a new key config, but default settings aren't suited for Korean-Style, it is important to find easy to press key combinaison.
I've only been playing for 1 year, and changing my key config really helped me get faster when I was learning fbs/tbf.
The point is to be able to use advanced moves/speed without bothering your fingers so you can focus on your aim instead of your fingers.
Reload->Sword:
Find 2 buttons you can press at once, check which button comes first-> assign to reload, and the 2nd one to sword.
For example 2 sidebuttons, press both at once to reload+sword fast in a single clic.
You could use middle+rightclics, or keyboard keys, but keyboard keys would slow you down if you use the same finger to dash.
Scrolling also works fine, for example middleclic=reload and scrollup=sword. You press middle while scrolling a little up at same time.
Weapon+Sword:
Make sure that when you press both, sword overwrite weapon.
Try to J-massive (spam weap+sword and not see the weapon logo in the right corner), it makes you a little faster if it works easily, if not I guess you're not loosing much speed.
I use my little finger to hit weapon 1 and weapon 2, to free my dashing fingers. You could use middlefinger I guess, since side-dash are the most used.
scroll-up=sword sends sword>sword>sword>(...) into the game when you scroll up, making it easier to do a quickswitch weapon>sword, requiering less timing.
Dashes:
My 3 middle fingers only do dashes. I moved to ESDF to get more room for little finger ^^;
Flip:
If you like to BlockRush (Dash>flip>block>jump), try to find a remaining key not too hard to press when dashing.
Example: WASD dashes, Q and E flips.
Or Ctrl, sidebuttons..
Block:
Left clic is my block, quicker response for TBF quickblock and other block-animlock moves.