Well, like I said at the start I got the original deck from Sean McKeown (but only after I first floated the idea of building a B/w Pox deck with Seal Of Cleansing).
Pox vs Trix
The Trix games are very hard if they play first and get a Mox start, because you cannot really disrupt them before Necro comes down unless you drew the Duress in your opening hand. If you are on the playside then you can hurt them more by Consulting, and a second turn Refrain is an effective counter against their Illusions. Also if you are drawside and they don`t get a Mox then you are in the same situation - they need to be 2 mana ahead of you in their main phase to give you a nightmare.
Unfortunately, two of the Trix decks I met did that in their first games and won very comfortably. It also didn`t help that in the first game of the SF I was forced to Mulligan down to five cards, and had nothing worth knowing about in hand.
In both second games that I lost I was beaten down by the fact that they SBed into a beatdown deck of Negators and Masticores (sometimes Hunted Wumpus). In the Swiss he made a Negator, I Poxed it away but had to discard my Scroll as I did so - but my Pox left him with only 2 land in play and 1 card in hand (I had Refrained one Necro already) so I said to him,
"Phew, I`m happy now unless that`s a Necro and the card on top of your library is a swamp".
He shows me a Swamp, he shows me a Necro.
Joy.
He makes a Masticore from his new hand and goes down to 2 life but I cannot find any damage in time.
In the SF I Duress out his combo but he is holding 2 Negators and a Masticore. I Pox him, killing both the Negators and leaving him on 3 land (next turn a Lilting Refrain will be active to stop the Masticore) while I have a Chimeric Idol in play. he makes a THIRD Negator and I die.
I feel a little unlucky about how I lost the SF, having to Mulligan and then him drawing a third Negator.
I beat the other Trix deck by simply keep nibbling away at his hand. Both games are REALLY tight and I think I play the deck perfectly to win them both (any mistakes and he would have won, it was that tight).
In the first I just keep disrupting and eventually force all 3 Donates from his hand, but it`s really tight in the end as I have to Consult for my final Duress in a twenty-odd card deck to win.
In the second I somehow win with a combination of Charms, all game I cast, in order; Ebony Charm, Demonic Consultation (for Duress), Duress, Funeral Charm, Funeral Charm, Chimeric Idol, Ebony Charm - it took perfect timing with those Charms to win it.
Key play was an Ebony Charm for 1 life point on the first turn, so he had to go off twice (expected he had SBed out his Firestorms).
You really have three targets with the Pox deck - the first is to discard the Necro before it hits play (which is why I have Addle in the SB). The second is to attack their Necroed hand, but they can protect it from discard so your best weapon here is the Refrains, which stop them from casting the Illusions. The final option is to attack their mana production, because they need 5 mana to pay the upkeep on Illusions and then Donate it - a succesful Pox or Wasteland here will wreck them. Also remember that most of their hand is valuable (either it`s a Illusions/Donate, or it`s a FoW or blue spell to discard to it, or the land they need to play) so if you time your Funeral Charms they can deal a LOT of damage.