Natural Nature

This is a deck that i have been working on for a while now, but i cant seem to make it stable. 1 time it works perfectly, and another time it sucks
Is there anyway that i can make it more stable, so i can rely on it?
Its really fun to use

Monsters (20)

Lvl 4 and below

Naturia Cliff (3)
Naturia Cosmobeet (3)
Naturia Fruitfly (2)
Naturia Horneedle (3)
Naturia Mantis (3)
Naturia Rock (2)
Naturia White Oak (3)
Sangan (1)


Spells (7)

Heavy Storm (1)
Lightning Vortex (1)
MST (1)
Pot of Avarice (2)
Super Fusion (2)
MBaas (2)

Traps (13)

Bottomless Trap Hole (2)
Ceasefire (1)
Dark Bribe (2)
Dimensional Prison (2)
Solemn Judgement (1)
Urgent Tuning (2)
TT (1)


Extra Deck (15)

Naturia Exterio (2) (Key Card)
Alie Of Justice Catastor (1)
Black Rose Dragon (1)
Brionac, Dotib (1)
Goyo Guardian (1)
Mist Worm (1)
Naturia Barkiob (2)
Naturia Beast (2)
Naturia Landoise (1)
Red Dragon Archfiend (1)
Stardust Dragon (1)
Thought Ruler Archfiend (1)




Notes:
So this deck resolves around getting Naturia Cosmobeet out fast, in your opponents turn, then tune it together with some of my other monsters, by using Urgent tuning, to get out 1 of the 2 Naturia Synchros you need for Exterio.

Then Fuse the 2 synchros into an exterio when you can and the game is almost won there.
Exterio is an awesome card.

Any help is welcome

Link:
Exterio

Hmm. I dont know much about this archtype but I'll take a look into it Futte and see what I can come up with.

Thank you shiki

IM gonna try your changes Infini

Well then, I was able to pull this together.

Monsters: 22

Naturia Cliff 3x
Naturia Whiteoak 3x
Naturia Mantis 3x
Naturia Butterfly 3x
Naturia Cosmo Beat 3x
Naturia Hornneedle 2x
The Hex Earth Sealed 2x
Armored Bee 3x

Spells: 12

Pot of Avarice 2x
Instant Fusion 2x
Verdant Sanctuary 3x
The Dark Door 2x
Mark of the Rose 2x
Brain Control/Mind Control

Traps: 7

Scrap Iron Scarecrow 3x
Mirror Force
Starlight Road 2x
Solemn Judgement

Ty shiki
Will try to combine your deck with mine

Edit: What fusion Monster should i add so i can use Instant fusion?