Technical merit? I don't really know. This is based on the open source tracker list from Disconnect (disconnect.me).
FWIW, I was never into paying for an ad-blocker on iOS since that comes with its pitfalls. I have tried a couple of other free ones, and I did like Adblock Fast [1], the one I was using until Focus by Firefox and the one I still have. It's open source and is available for Chrome (not iOS), Opera (not iOS) and Safari (iOS 9). I'd suggest reading through the GitHub page to see some stats as well as the philosophy (of not making money or compromising it with acceptable ads). [2]
I always used someonewhocares.org host list on my wireless modems to protect my IOS devices (which never leave the house anyway, since they exist only to test apps/sites for people like you that do not value device ownership :)
the list that site provides blocks practically every single ad, malware, etc. But it is not very practical to keep up to date.
FWIW, I was never into paying for an ad-blocker on iOS since that comes with its pitfalls. I have tried a couple of other free ones, and I did like Adblock Fast [1], the one I was using until Focus by Firefox and the one I still have. It's open source and is available for Chrome (not iOS), Opera (not iOS) and Safari (iOS 9). I'd suggest reading through the GitHub page to see some stats as well as the philosophy (of not making money or compromising it with acceptable ads). [2]
[1]: https://itunes.apple.com/us/app/adblock-fast/id1032930802
[2]: https://github.com/rocketshipapps/adblockfast