Sling dominates the meta, so what do you do? Just play no units. I am currently 9:2 between diamond 3 and 2 with this pile of removal and pure beacon value. Cylixes are good, so we play a lot of them, and Symbols help to make them undepleted fast to play on curve from turn 2 or 3 onwards. The relics in this deck keep the value engine going, while your cheap removal spells help to keep the board clean. Transpose and TJS Display into Waystone help to keep your relics against removal and protect you from Menace against the rare mono Shadow decks. Your Menace can seal the deal against slower decks and usually against Sling too (harder if they play Transpose, but if they forget to keep 1 mana open or you can bait it out before, Menace can easily deal enough). The best wincon against Sling and other slow decks so far was Greatsword+removal tho. Just attack every turn and keep the opponents board clean, while drawing cards with Wand and Beacon. Also, dont play units into Slings, because the overwhelm damage stacks up over time and can kill your Sword. That makes Beacon a bit akward sometimes, so maybe 3 Wand and 1 Beacon (or 2 Sword and 1 Beacon) is correct, but Beacon is to much fun to not at least play 2 (and keep in mind that you can Plunder an unplayable Beacon card into a sigil and play that to advance the Beacon chain). Good luck and have fun!
I've updated some numbers and swapped out some cards for others which I am trying out to see how they go.
All-in-all a fun brew and enjoyable to play. Thank you for posting this decklist. :)
3 From Anguish (Set9 #78)
4 Transpose (Set8 #89)
4 Beseech the Throne (Set9 #212)
2 Just Desserts (Set9 #332)
4 Petition (Set4 #274)
4 Send an Agent (Set1097 #17)
4 Display of Knowledge (Set5 #233)
4 Display of Purpose (Set8 #193)
4 Display of Vision (Set5 #249)
4 Wisdom of the Elders (Set1 #218)
4 Shen-Ra Speaks (Set7 #176)
2 Sorcerer's Wand (Set8 #199)
2 Massive Greatsword (Set9 #106)
3 Time Symbol (Set9 #37)
2 Justice Symbol (Set9 #73)
2 Cobalt Waystone (Set3 #151)
1 Primal Symbol (Set9 #109)
3 Shadow Symbol (Set9 #145)
1 Seat of Progress (Set0 #58)
4 Elysian Cylix (Set9 #196)
4 Xenan Cylix (Set9 #199)
1 Seat of Order (Set0 #51)
4 Argenport Cylix (Set9 #205)
1 Seat of Cunning (Set0 #62)
--------------MARKET---------------
1 Burglarize (Set4 #224)
1 Deathstrike (Set1 #290)
1 Malediction (Set6 #208)
1 Silverblade Menace (Set1087 #10)
1 Wasteland Broker (Set9 #214)
Here is a list that is better against Sling (currently 3:0), but also solid against the rest. Beacon is usually dead against Sling anyways, because you can never play the units from it and fire isnt necessary without Sling. That makes the powerbase smoother and allows you to play double primal cards like Wisdom. The JPS Display is another good counter against Sling (and also Shrine and Beacon), while not being dead because of the removal part (and you have a lot of 3 mana fast spells, so keeping up 3 mana is usually no big problem). 2 Greatswords make the matchup better and you have 14 fast answers for an ambushed Touvon now (Agent, Transpose into Deathstrike, Display of Purpose, Just Desserts).
Instead the Deathstrike.
You can deactivate more menaces with it.
If somehow you lose that, your chances of winning decrease a lot.
If you want to have the two beacons and the wands, perhaps you could take out one oasis (I think three oasis are enough).
A very interesting deck, although the games can be very long!