Mono air is always a good option, the cards can be used elsewhere too, and we will most likely splash 6 cards in there because we can. (At this point in time)
After that, I'm thinking the Gravity Anti Rainbow one
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55k 55k 55l 55l 55v 55v 55v 55v 55v 55v 576 576 5oc 5of 5of 5og 5ol 5oo 5pu 5pu 5pu 5pu 5pu 5pu 5pu 5pu 5pu 745 745 745 8pl
The mitosis ones for high potential damage output (stalls)
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5c2 5c2 5c2 5c2 5c2 5c9 5c9 5c9 5c9 5c9 5od 5od 5od 5od 5od 5of 5of 5of 5of 5op 5op 5pu 5pu 5pu 5pu 5pu 5pu 5pu 5pu 5pu 5pu 8pn
Or even something like this, if we really need to fill the phoenix gap.
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5f0 5f6 5f6 5fc 5fc 5fc 5fc 5fc 5fc 5gi 5oc 5oc 5oc 5oc 5oc 5oc 5oc 5of 5op 5pu 5pu 5pu 5pu 5pu 5pu 5pu 5pu 7mv 7mv 7mv 8po
About to look through what teams played against Air in the first 4 rounds last war, then we can look through that and figure out what cards people like throwing at us, and therefore what might be slightly better.
I've tried to grab just the key-ish cards, not really the changeable ones.
Round 2:
Firestall: Sanctuaries, Rage Potions, Faerenheights, Deflagrations
Discord/BH : Discords, Black Holes, Aboms/Dragons/Armagios
Poison/Stall/Rush? : Poisons, Miracles, Skull Shield + Plagues
Ghostmare: GotP, Nightmare, Rewinds, Steals
Mono Dark: Pick and Mix of Darkness cards.
Voodoo: Voodoo Dolls, Basilisk Bloods, Gravity Pulls
Mono Aether: Dimshields, Dragons, Lobos
Mono Earth: Basilisk Bloods, Stone Dragons
Round 3:
Fire Splash: Poison, Deflags, (Bone) Dragons
Aether Duo: Anubis, Pharaoh, Lightnings, Dimshields ???
Discord/BH: Discords, BH, Gravity Pulls, Aboms
Aether Duo: Dragons, Quints, Dim Shields
Bonebolt: Lightnings, Poison, Bonewall, Electrocuter and Arsenic!
Air Splash: Toadfish, Ice Bolts, Dragons, Shockwave
Entropy Splash Antimatter, Discord, Crusader, Miracle
EQbow: EQ, Novas, Devoruers, RTs, other speedbow cards.
Round 4:
Aether Duo: Dimshields, Quints, Dragons, Lightnings
Fractal: Devourers, Fractal, Minor Vamps
NovaGraboid : Graboids, Tridents! also, 1 Reflective shield (uncommon in this deck type)
Gravity Duo: Otyugh, Blessing (Grav Shield)
Rush: Immo, Phoenix, 3 Deflags, 6 Reverse Times!!
Time Duo: EQ, RT, GotP, Stone Dragons
Time Splash: Dragons, RTs.
Aether Duo: Dimshields,Quints, Dragons (2 Lightnings)
Might be worth it to go to R5, but the further from the start you get, the more random the deck selection is.