Also I wonder if Alk would be too low. Like let's say your alk dropped to 7. Then you do a 10% water change, it's not going to bump it up much. Then you are low on Alk unless you either dose Alk or do a large water change right? But it seems Tropic Marin also says to use their pro reef salt if you want to maintain between 6-8 dKH when that salt has a dKH of 7-8 as well. So maybe I am missing something.
They're not mutually exclusive, some dose to get away from regular water changes, some do water changes regularly to not dose. BUT plenty of people dose and do regular water changes.
Seriously, honestly, I think you're too set on a specific number and what you really need is keeping stable numbers at where your corals look healthiest.
I believe temp, salinity, lighting and flow to be just as or even more important.
If you don't have proper flow or lighting those numbers don't mean s#*t
All sorts of people here grow corals without dosing and just do water changes.
I'd go out on a limb and say most don't dose, if when they do it's after a year or two. I could be wrong though.
You're also presuming things that may or may not really happen; like "Let's say your alk dropped to 7 then 10% wc" yada yada yada...if you set the goal posts wherever you want you can make anything sound confusing as all hell.o
I say pick a salt and stick to it UNLESS you have to change for reason x, y or z.
I also say watch params more often than before because of all the new corals and the nem, THAT DOESN'T MEAN ADJUSTING OR DOSING MORE OFTEN. I say this so you can monitor and graph what your levels are doing so you can make a new water change schedule based on the new graphs you've made.
After new water change schedule if you have issues with elements depleting too fast or unevenly to a point the water changes won't help...then start to dose.
But that's just my opinion take it all with a grain of salt. No pun intended
knowledge from like 10 years ago lol. probably should read that article again without the tv on the in the background.. 
