Debating removing Ruby Core for the usual reasons.
Amulet is a good option, LGS dependent.
Char Omph is a draw more option however, T4 is the most important turn in the game to me so it's excluded atm.
Betrayal > Infiltrate. a) instant use/no counter-plays. b) costing one more is negligible. c) too much anti-stealth tech.

This is a switch deck that can operate as aggro or midrange match dependent. You have solid removal, excellent draw, and a tougher late game minion package. Other than auras such as Sphere of Animosity, the deck performs very well against every match up I've played. Listed below are some avatars and some strats.

Pathfinder: 1st or 2nd is fine. I prefer 1st against them for tempo reasons. Just hard focus on hitting him with spells/charge, he'll have to respond to your moves. Vindictive Nation shuts down the site destruction version. If you go 2nd against non site destruction, Lions are your buddy, as they outpower his minions on the clapback.
Imposter: Just hit his new mask with a damage spell and make him waste the three mana to change. It still has 0 power no matter what face he has on, hit him.
Speaker/Archi: Cemetery hate, there are four sites with it, mulligan for them. Depending on how much draw tech he has, you can potentially out-draw him. Keep pressure. You could also add the Hyena as there are eight demons in the deck.
Enchantress: S/Z formation of sites, and flank around.
Necromancer: Mulligan for Gnaak/Sinkhole. Dragonettes/Firebolts are good at stopping his early Wendigo if your on the play. Begone is a great card and is in here for this match up or corruptor. Famine will help keep them controlled both above/below sites. This is a match that you want to swap to a more controlling approach unless you can clear a way for aggression. Samael will help you take a decent chunk out of their life for mid/late game, use him. Wards on both the Cherubim/Samael will have to make them 2-1 which is what you want, as your draw is superior. Necro is not a push-over match at all, plan accordingly.
Mirror: Go 1st, control the tempo, and kill them.

Regarding my performance at Milwaukee SCGCON this past weekend, I'll give you a break-down of my six matches.

Pathfinder: I went first, killed the minimal amount of units he ended up drawing, took some damage from a betrayed unit, then killed him by T7.
Pathfinder: I went first, controlled his minions with tempo, and sent burn at his face. He wasted infiltrate as his T4 play and it cost him the game. I responded with Blaze of Glory with my Dragonette, killed his other two minions, myself, and broke the infiltrated unit from stealth as it had four power. Game over two turns later.
Necromancer: I was on the back foot most of the game as I kept drawing magicks > units the first four turns. The amount of removal and innate card draw allowed me to clap back. I destroyed a couple of his sites with submerged minions to stabilize. A well timed use of Warp Spasm allowed me to remove his whole board. Poison Nova followed, and Thais closed it out with his own Lord of Lies. I was at nine life when I killed him.
Archi: Longest and closest game of the event. I went 1st. Cemetery hate came into effect early along with some charge. We traded everything several times between us, including life totals with Morrigan action. Near the end he petered out on card draw and I kept threatening him with things he needed to remove, which he did! The mid-game Thais I used to blow up his own site with sinkhole and waste his hand/cemetery began his downfall. The end result was my victory because I put him on DD first, then top-decked his demise. Easily the most fun match the whole event.
Savior: I went 1st and applied pressure, he responded in kind. I was at eight life when I DD, then killed him around T7. His Whirling Blades helped him get me lower in life, but in the end committing the extra one mana per turn to ward his guys caused him to lose to my deserts, bolts, and pings. Usual match up.
Archi: Same opponent as round four. The game from the start was in my favor as I chose to go 2nd and just push damage. He couldn't advance his own token strategy as he had to respond to my threats instead. While I didn't have the cemetery hate package as in game four, it was pure minion after minion that he couldn't keep up with. He moved poorly at DD, forgot I had a River of Flame out and it killed him with burn.

Fire In the Blood (SCGCON 1st).

@Bayushi