I'm not so sure about Creator or the Momongas. Neither their Attributes or effects really fit the theme.

Also, Twin-Headed Behemoth is Limited to 1, FYI.

I would switch out the Brothers for Luster Dragons (the 1900-ATK version)

Winged Sage Falcos is a cool card, but it works best with Final Attack Orders.

Here are my suggestions:

-3 Harpie's Brother
-1 Creator
-3 Nimble Momonga
-1 Sasuke Samurai #4
-1 Winged Sage Falcos
-1 Twin-Headed Behemoth
-2 Draining Shield
-2 Axe of Despair
-1 Mage Power
-1 Monster Reincarnation
+1 Slate Warrior (if you can get one)
+3 Luster Dragon (4-star version)
+1 Silpheed
+2 Second Coin Toss
+2 Final Attack Orders
+2 Giant Trunade
+1 Mystical Space Typhoon
+1 Rising Air Current
+1 Terraforming

That should work pretty well. Second Coin Toss is for use with Sasuke Samurai #4. Final Attack Orders puts a cool spin on the deck, especially when combined with Slate Warrior or Winged Sage Falcos (don't forget that FAO switches a face-down Defense monster to Attack Position when it's attacked).

good deck, i would take out the creator, it serves no real pupose, i would also say turn it into a harpie deck, thats just a personal preference, its up to u.

Cyber Harpie Lady is helpful ATK 1800/DEF 1300 - "This card is treated as a harpie lady"

Plz r/f my deck in my sig

also if u look at my armed dragon deck, a lot of my attack force (i think all of it) is wind monsters, armed and luster work really good for me

also if u build ur deck right, u won't need rising air current, after i revamped my deck (took out brute force for more effects) i took out the need for rising air current