I'd go straight to the Point. This Article would be divided into 3 parts, and i'd make it as detailed and simplified as possible.
#1. Do not use a VPN.
One terrible mistake we have made in the past is using a third party VPN software/application.
Once you make use of a VPN (especially free or weak VPN), it is detected as your original home location. Therefore making searches of friends, groups, pages, and events of other location other than your that location poses your account at a termination risk. This is because your account has been termed SCAM!
If you must use a VPN, use built-in app VPN. For instance, the latest version of Opera mini has been built with a VPN. This anonymously gives access to sites that save cookies, like Facebook.
#2. Use a Unique Device.
For the fact that your account was created from a suspected ip address already posses a risk of termination, so maintaining a particular device can be helpful.
Pro tip: Create and Manage your account with a Computer, while your chatting should be done via Facebook Messenger. Take caution to maintain this mobile device, as it reduces the risk of your account being compromised.
More so, DO NOT USE THE SAME BROWSER ON YOUR COMPUTER FOR ANOTHER PURPOSE.
Dedicate a single browser (preferred: Mozilla Firefox) to the running and management of your Facebook account. Other browsing activities can be done on other browsing softwares like Google Chrome. This way, your account is safe as Facebook can not steal cookies from other sites you visit and know that your account may be a scam.
#3. Make it Real.
Do not search for friends, groups, pages like you are bombing searches. The Facebook Algorithm will instantly detect your account as scam, and probably deactivate your account.
Add friends who only has things in common with you. First Join Groups, or Like Pages and add people who are members of the group, or liked the page.
Then you can add the friends of these friends and grow mutual friends.
Put off your locations off, and only add people you have things in common with.
These are the best proven ways to secure your Facebook Account from Deactivation.