Antivirus and Malware Defenders In use

Guys iv been using Avast Premier for the past few years now …and i thought i was complete with it ,i thought i didn’t need any other application to use for defense

but ever since this incident-:https://forum.avast.com/index.php?topic=219143.0

i began to Use Avast Premier , Malwarebytes Premium and McShield AntI- Malware Tool

so i wanted to know if its safe to use all three of them …since i noticed that Malwarebytes protect from ransomware which is also on avast so i was wondering if i really need that? or now am 99.9% protected which is better??

or do you have any advice which you feel i need?