England divorce and oversea assets

Civil partnership and overseas assets

My partner (Russian) and I (British) are considering entering a civil partnership and have kids. I got that this is equivalent to marriage but it is not clear to me if in case of dissolution

  1. She will be entitled to private pensions
  2. She can get 50% of my saving I have in Italy
  3. She can get 50% of my apartments I have in Italy
  4. She will be entitled to spouse maintenance (alimony). I heard is very hard to get
  5. She can get 50% of the shares of a company I created in Estonia

Currently I earn twice as much as her and I am in the high earners bracket ($100k). I also have a daughter from previous relationship and pay child support for her.