Tips for National+Corporate play (1 player 2 things)

A few days ago, things were going great.

I had 70 GC in my account
My home country was mostly state-run enterprises, but I was slowly letting the country grow
My slave country was mostly private enterprises, but I was managing it as well

When suddenly, the owner of about half, if not more than half of the private companies in my slave decided to withdraw his corps.

I wasn't paying full attention (been playing a lot of stellaris as of late) and only noticed when I went into deficit.

Anyway
Long story short, I had to start my own company to try to right the sinking ship.

I think I've done so. It's the Territor corp. All my countries have "Territor" in the name. (LU)

In short, I'm wodnering about some tips for running countries and corps where they help one another.

I've already been able to buy out all the state corps in my countries that were over 500B, as well as relocate one or two stable successful corps from my home to my slave to balance things out. Any other tips?


As a side-point, I've been told some corps (IE producing certain things) are simply never profitable. What corps are these?

I stick with high tech and industry for corps. They seem to be reliably profitable.
I also tend to IPO my corps to enterprise controlled. There are a few IPO guides on here that tell you how. I find that a profitable way to run my country.
As for my enterprise, you need at least 500 corps to be profitable I think. I go for the same types of corps I build in my countries and of course I use it in the IPOs from my countries.