Is a mono Freaks deck viable? If yes, what cards would be included in such a deck?
Thanks for any replies..

Not really since there aren't any support cards, and their bonus only activates once...

They used to be viable. Now with the bans I'm not so sure

DR's are important I guess... But without Olga you can't just cheese your way through any opponent in first round to ensure you get the poison

Unless it's not for ELO then yeah, they can own

It's only recommended if you want some challange.
Freaks is one of the worst clan to play in mono in any format.

Mono-Freaks is very well playable, but hard. I have friends that play mono-Freaks all the time. Obviously not elo mono-Freaks, but whatever.