Which of the Bitcoin wallets between the Online and Offline works best?
It depends on you. I choose offline wallet but I have also two of them. Sometimes it is good for you to have online wallet. If you are worried about security, offline wallet is better than online wallet.
For me online is better, because with a wallet stealer they can scan your pc. If they find it they just will upload the files to the hacker. Thats why i use a online wallet but only blockchain.
I trust blockchain because a lot of people already are using it and even my friends are using it.