Spellcounter Deck (Suggestions needed)

So here's what I've got so far. I'm not exactly sure what else needs to be done with this deck. It seems as if it's too slow so I'm definitely wanting some constructive criticism. Ultimately, I'm just lacking a specific focus on which route I should take this deck. Should I focus on getting Arcanite Magician to the field?

Deck: 40
Monsters: 20
Defender, The Magical Knight x2
Injection Fairy Lily
Magical Exemplar x3
Apprentice Magician x3
Old Vindictive x2
Night's End Sorcerer x2
Frequency Magician
Breaker, The Magical Warrior x2
Endymion, The Master Magician
Magical Marionette x2
Chaos Sorcerer

Magics: 14
Spell Power Grasp x2
Terraforming (Don't have a third Citadel, so that's why I need this card)
Magic Citadel x2
Heavy Storm
Magical Dimension x2
Dark Hole
Monster Reborn
Gold Sarcophagus x2
Pot of Avarice
Lightning Vortex

Traps: 6
Bottomless Trap Hole x2
Mirror Force
Call of The Haunted
Magician's Circle
Torrential Tribute

Extra Deck: 8
Colossal Fighter
X-Saber Urbellum
Arcanite Magician
Stardust Dragon
Red Dragon Archfiend
Tempest Magician x2
T.G. Wonder Magician

Possible cards to put in (and switch out other cards):
Mind Control
Mystical Space Typhoon x2
Kycoo The Ghost Destroyer x2
Swords of Revealing Light
Arcane Barrier
Nobleman of Crossout x2
Shield Crush
Summoner Monk x2
Call of The Haunted
Crystal Seer
Night's End Sorcerer
Breaker The Magical Warrior
Spell Power Grasp
Endymion, The Master Magician
Flamvell Magician

It seems like you have a deck based on spells then traps.
That'll help, a good card to use for when you activate spell cards is [ Rapid-fire Magician ] It's effect states for each normal spell card you activate [ That does not mean Equip spell cards ] You're opponent takes 400 Damage.
-If you wanted to base a deck around dark magician, skilled dark Magician will also help, get three magic counters on that card, tribute that and the counters to special summon 1 dark magician.

Some cards to consider you may have overlooked or may want to give another look:

alchemist of black spells
dark red enchanter
silent magicians (though people often devote a lot of a deck towards a lv monster)
royal magical library

When someone runs a spell counter deck there's normally variation between preferences. For Instance I don't care much for rapid-fire magician and like to try blast magician (he normally doesnt work for me), but others do. Also, I like dark red enchanter over magical marionette, but others like the monster destruction over the hand destruction. I'm just making sure these guys didn't get overlooked

Well, well, well.
Spellcounter Spellcasters.
I haven't seen these in a while.
Your build seems like it needs a slight pace change.
I'm aware this deck needs more spells. Try the old fashioned Toon Table of Content Engine, it does wonders, but I tossed in Dualities to pick up the pace since the deck itself starts off slow. It's just some suggestions.

Monsters = 20
3. Breaker the Magical Warrior
2. Chaos Sorcerer
3. Defender, the Magical Knight
2. Effect Veiler
1. Endymion, the Master Magician
2. Flamvell Magician
3. Magical Exemplar
2. Night's End Sorcerer
2. Summoner Monk

Spells = 14
1. Dark Hole
1. Foolish Burial*Dump Endymion to the Grave or Material for Chaos Sorcerer*
1. Heavy Storm
2. Magical Citadel of Endymion
2. Magical Dimension
1. Monster Reborn
2. Mystical Space Typhoon
3. Pot of Duality
1. Terraforming

Traps = 6
2. Magician's Circle
2. Gagaga Shields*Immunity up to twice a turn for the win, or run Bottomless and Solemn Warnings*
1. Solemn Judgment
1. Solemn Warning

t.g. wonder magician and no non-tuner t.g.??? you can add instant fusion to summon kaminowizard or musician king for synchro material of tempest or arcanite magician... also dont see any use of fairy lily and night's end sorcerers here... summoner monk will do much better on this deck... t.g. hyper librarian will also be a good card on it...