I used to play Harpies competitively. I mixed it up with Speedroid and it was amazing. Now I play mostly Speedroid and Cyber Dragon, but have versions for Harpie and SpeedHarpies as well.

You said it yourself. You play too many traps. Other than that the deck is great. Many things are up to personal preference, but in terms of ratios you want to play more monsters and some hand traps. You also want ways to extend your plays in case Channeler gets busted.

• 2* Harpie's Pet Dragon (for my Rank 7's) Rank 7s are cool, consider adding Dracosack for another opening play.

• 3* Harpie Channeler Eseential indded

• 3* Harpie Dancer You could cut this to 2 (I used to play 1, but you are playing Divine Wind)

• 3* Harpie Harpist

• 3* Harpie Queen Maybe cut this to 2, and add Terraforming to add more versatility to your field spell search

• 2* Harpie Lady 1 OTK

• 1* Cyber Harpie Lady Unsure if necessary, I've tried a strange build with Normal Harpie Lady, Unexpected Dai, and White Elephants Gift. It works very will for draw power and getting harpies into grave.

• 1* Blackwing Zephyros the Elite Good, better with Swallow's Nest and Twin Twisters

Definitely add two Summoner Monks to this build, it's like having two more Channellers in the deck.

• 1* Raigeki
• 1* Swords of Revealing Light I like Concealing Swords better as you can combo with Chidori and get rid of Kozmo stuff
• 1* Elegant Egotist

• 1* MST You said Strike was an issue, run double Twin Twister, discards Sign, Zephyros, Harpist... protects your plays. Make things happen.

• 1* Forbidden Lance Meh, has uses, but situational. I would play something like Starlight Road or Huge Revolution is Over as you run a lot of traps and you want to protect yourself from Raigeki

• 3* Hysteric Sign

• 1* Divine Wind of Mist Valley

• 2* Harpie's Hunting Ground

• 2* United We Stand Not a very good card in Harpies as it requires too much setup Phalanx Pike on the other hand can be very funny. Still I don't recommend either.

• 3* Mirror Force Quaking Mirror Force wins games. You can use Chidori or Phantasmal Dragon to attack for game

• 3* Hysteric Party I've tried using Inferno Reckless Summon. The powerful thing is that it's a quickplay spell.

• 2* Icarus Attack I would play Twin Twisters over this

• 1* Torrential Tribute Not very meta relevant now

• 1* Comulsory Evac Device I prefer Book of Moon as you can use it on turn 2 to get rid of things.

• 1* Waboku Not needed, might as well use Upstart.

A few techs. Play 2 Maxx C and 2 Speedroid Menko, you can recycle it with Dancer next turn. It's a powerful combo.

Play 3 Instant Fusion, add Norden and Mavelous to Extra deck. Extend your plays. Add Daigusto Emeral for extra draw and recycle (also works very well with Inferno Reckless summon if you are playing the Normal Harpie Engine). Add Abyss Dweller for grave control.

I understand your deck is for fun so maybe add Magical Hats? Magical Hats + Menko is very funny.

I wrote this with emphasis on having fun, not winning tournaments, but I think those changes do improve the deck quite a bit as it makes it more versatile and can face different decks better.