Asking basically the same questions in more than one thread can lead to severe confusion / difficulty keeping track of every tip, suggestion & tidbit of advice for everyone involved.
What type of inhale do you prefer Mtl or Dtl?
This info makes all the difference in the world on which delivery devices folks might recommend.
What size, shape, power range, battery configuration ( built in, single, dual or triple removable cell) and any other features do you want?
This info makes all the difference in the world on which power devices folks might recommend.
Using a more efficient regulated higher power setup the chance you'll need to stay at 24mg/ml nic is quite slim.
The only way to decrease throat hit when using 24 mg/ml nic would be to use liquids containing salt nic/protonated nicotine instead of free base nic.
Vg is slightly thicker, produces clouds, is smoother, has a sweet taste even by itself, slightly mutes flavors so most high Vg liquids contain slightly more flavorings.
Pg carries flavor better/ allows a more crisp or accurate representation of the flavorings, lets the nic throat hit come through & has a noticeable throat hit by itself.
Without knowing anything about the way you prefer to vape and what your needs / wants are;
Could be a Geekvape aegis solo ( small, single 18650 rugged, easy to use) and the cereberus tank for Dtl, or a innokin zenith with 1.6Ω head for Mtl.
I'd suggest 6mg/ml - 12 mg/ml for the Dtl subΩ 'tank'.
12 mg/ml - 24 mg/ml for the Mtl 'tank'
The likelihood of needing to substantially reduce nicotine coming from a Nord going to a better setup is high.