This is my take at building a "Simorgh" deck. "Simorgh" is actually a pretty interesting archetype in my opinion, stemming from the first Wind-Attribute Structure Deck back in the day which included "Simorgh, Bird of Divinity" as its boss monster and gave one of the biggest monsters in the archetype "Simorgh, Lord of the Storm" its name. "Simorgh" as an archetype consists entirely of Winged Beasts and the strategy puts its focus on interaction with both players backrows and Normal/Tribute Summoning. In case you are wondering: Since I want to mention some of the interactions in the deck, I will not go strictly by monster, backrow, Extra Deck, but instead mention whatever comes naturally and makes sense at that point in time.
For starters, the deck actively makes use of its smaller members: "Simorgh, Bird of Beginning" gives you another Normal Summon upon being Normal Summoned, which makes it a great monster to include into your summon chain if you have anything else to summon afterwards; "Simorgh, Bird of Bringing" is the archetypal searcher and therefore fetches you whatever card you need or is missing; and "Simorgh, Bird of Calamity" is a "Foolish Burial" on legs, allowing for easy Link climbing with certain cards form the Extra Deck. All of those monsters have an additional effect that allows you to Special Summon them from the graveyard if the opponent has no backrow, but they get banished afterwards and locks your Extra Deck summons into the Winged Beast-typing. However, this effect allows you to get further mileage out of your monsters and is paramount for setting up a strong board; but I will come to that.
The bigger monsters in form of "Simorgh, Lord of the Storm" and "Simorgh of Darkness" provide useful control effects in form of negates and bounces, but while "Simorgh, Lord of the Storm" only goes back to the hand from your graveyard when a Winged Beast monster in destroyed in battle, "Simorgh of Darkness" actually serves as solid recurring beater, since it will enter the field from either the hand or the graveyard when a Tribute Summon occurs. You can therefore set it up in the graveyard, Tribute Summon "Simorgh, Lord of the Storm" and gain the other bird for free. This notion is also supported by "Trade-In", which can discard "Simorgh of Darkness" since it is a Level 8 monster and "Simorgh Onslaught", which will search for further useful monsters while putting "Simorgh of Darkness" right where you want to have it.
The most important Extra Deck monster to summon by far is "Simorgh, Bird of Sovereignty". This beast allows you free Winged Beast monster summons from the deck and sets up "Barrier Statue of the Stormwinds" to stop most opponent's Special Summons or "Dark Simorgh" to keep the opponent from using Spell cards rightaway. On top of that it has various protection-esque effects that make handling your board that much harder. Going into this monster is very much possible with the aforementioned smaller "Simorgh" monsters: You can get up to three Normal Summons per turn in the archetype (the one Normal Summon you have anyway, one via "Simorgh, Bird of Beginning" and one via "Elborz, the Sacred Lands of Simorgh") which is exactly the number of monsters needed for "Bird of Sovereignty". But there are also better options available. Since all of the small birds can be re-summoned, you can make elaborate summoning chains with no real cost or effort: Summon "Simorgh, Bird of Calamity", ditch any of the Level 1-4 "Simorgh" monsters, re-summon the ditched monster, Special Summon "Harpie Conductor" from your Extra Deck, then re-summon "Simorgh, Bird of Calamity" to use both it and "Harpie Conductor" to summon "Simorgh, Bird of Sovereignty". That is, while it uses multiple cards to get it running, a combo that only uses one card from your hand to work. There are various other scenarios you can use with the small bird, just keep in mind that you want to get the free summon of "Simorgh, Bird of Sovereignty" at the end of it all, so there should be a certain priority attached to summoning it.
The rest of the Main Deck monsters serves to help the board come into shape: "Simorgh, Bird of Protection" works similarly to the other small "Simorgh" in that it has the same re-summoning effect but actually takes care of pesky backrow should that be required. It is simply not that highly needed and can be searched, so I only run one copy of it. "Blackwing - Zephyros the Elite" has a recurrence effect similar to the smaller "Simorghs" but also features the Dark Attribute, which allows you to summon "Dark Simorgh" via its own effect more often. Talking about "Dark Simorgh", the deck can use the "Dark Simorgh lock" with relative ease, which is exactly the reason why there are two copies of "Anti-Spell Fragrance" in the deck. Stopping the opponent from using Spell cards temporarily is nice, but barring them from using such cards altogether is better. "Barrier Statue of the Stormwinds" is a very nice addition in my opinion and was/is commonly used in combination with "Simorgh, Bird of Sovereignty"; but in a pure "Simorgh" deck, you even have the option of summoning it during your summon chain since "Elborz, the Sacred Lands of Simorgh" allows the summon of any Wind Winged Beast monster, not just "Simorgh". "Mist Valley Apex Avian" is a solid option for effect negation that can also be summoned via "Simorgh, Bird of Sovereignty"; there is also the option of running the combo with "Mist Valley Thunderbird" and "Union Carrier", but that was too expensive in my opinion. Lastly "Raiza the Mega Monarch" is a Wind Winged Beast that profits from being Tribute Summoned and seemed to be a pretty strong option in certain situations, so in it goes.
The backrow is rather straightforward: Three "Elborz, the Sacred Lands of Simorgh" give stat boosts, easier Tribute Summoning and further Normal Summons, three "Simorgh Onslaught" work as the double searchers and setup for cards like "Simorgh of Darkness", two "The Monarchs Stormforth" can clear the opposing field while you profit via Tribute Summons, two "Trade-In" as helpful and inexpensive draw options, two "Simorgh Repulsion" against opposing backrow, "Foolish Burial" for the same setup scenario I described when talking about "Simorgh, Bird of Calamity", one "Monster Reborn" for obvious monster revival, and one "Terraforming" to have access to the Field Spell more often. The Traps consist of two copies of "Anti-Spell Fragrance", which I have already explained and three copies of "Harpie's Feather Storm" as pretty insane effect negation.
The Extra Deck is pretty budget-friendly in my opinion and leaves room for changes: "Salamangreat Almiraj" is both useful for Link Climbing and a pretty solid option overall, "Harpie Conductor" is used for the Link Climbing into "Simorgh, Bird of Sovereignty", "Hi-Speedroid Rubberband Shooter" is another option for more Normal Summons, both "Fire-Fighting Daruma Doll" and "Knightmare Phoenix" serve as backrow removal and the two Xyz options can be reached with relative ease if "Simorgh of Darkness" is involved. A cheap monster removal option that one can climb into is possible with the three monsters "Linkuriboh", "Security Dragon" and "Detonate Deleter": If "Linkuriboh" is summoned first, you can bounce one monster via "Security Dragon" since it will be linked with the Link Arrow from "Linkuriboh". If you then go into "Detonate Deleter", you can use one of the excess "Simorghs" to tribute for its effect to get rid of another monster, while a third would automatically be destroyed via the first effect of "Detonate Deleter", handling a total of three monsters if unimpeded. Granted, the combo is easily negate- and obstructable, but it is a dirt-cheap way to gain board control in certain situations.
I found "Simorgh" to be a fun and interactive archetype that can be scaled upwards if the budget allows it. As usual, I wrote a more in-depth analysis about the entire archetype and all cards in it plus useful cards and hints that I simply cannot all fit in here. If you are interested, feel free to visit the "Simorgh" article on my blog here: https://cubiccreativity.wordpress.com/2020/11/19/archetype-analysis-simorgh/