Which of the Bitcoin wallets between the Online and Offline works best?
I do use an offline and online wallet, it is best that you do not put all your money in just one wallet. I always do diversification.
I also use mixture of online and offline wallet. I use offline wallets because they are the safest. I combine offline wallets with online ones because they are more user friendly.
For holding large amounts of money I prefer to use offline wallets. Hackers wouldnt reach it any way. But online wallets easier in using in making transactions and in verifying its own account.