I use blockfolio. But I use the strategies of holding altcoins for a long time and sell them only from x2. In the blockfolio, you can put an alert on the growth of the coin-it's very convenient! 
Me too, but I also use coinmarketcap to track the prices of my coins. There is no portfolio creation option in there, but I still love it because of its simple and user friendly interface.
Yes coinmarketcap is the best one.
I went the completely lazy route. I mostly just buy and hold things that are supported in Exodus/Eden Wallet, so I can see them and manage them all in the same place. They support about 25 assets now, and plan to support quite a few more. I do have some holdings that are not supported, and just keep them in separate wallet.