Mainly been using Opera lately. I used to use Dolphin quite a lot but it seems to have been neglected in the last couple of years.
I'm hoping an iOS release of Vivaldi will occur at some point. I don't really care for Opera, but I don't like Firefox or Chrome on my iPhone/iPad.
And while all third party browsers are forced to use Apple's rules and thus are essentially reskins of Safari…I HATE Safari. I hate it on every platform that app runs on and will never use it unless I have no other options.
The absolute worst part about it is that you cannot customize it - unlike Chrome, Firefox, Vivaldi, Opera or any other fork of those browsers. And when I say customize, I'm not talking about plugins or extensions.