Needing advice reef chemistry

[sobe]

So i finally got my but off and tested my water parameters. Im in shocked on how low some of the levels are.

Calcium-320
Alk-7.3 dkh
Mag is 800

I got Randy's 2 part mixed and ready. I have calculated total volume of each solution i need to dose to raise to my desired level

My target would be 400 and 1100

What is safe way to raise everything? Ive read online max for Cl is 50ppm and mag is 100ppm per day.

Also if i raise what is a good dkh to shoot for?
Thanks