This is a deck that I made up myself in the game Yugioh GX spirit caller

Monsters:

Cyber-Tech Alligator x1
Luster Dragon x2
Luster Dragon #2 x1
Birdface x3
Bladefly x2
Cyber Harpie Lady x3
Dancing Fairy x1
Flying Kamakiri #1 x1
Harpie Lady Sisters x2
Little Winguard x1
Spear Dragon x1
Twin-Headed Behemoth x1
Total =19

Spells:

Different Dimension Capsule x2
Elegant Egotist x2
Gust Fan x3
Harpies’ Hunting Ground x2
Heavy Storm x1
Mystical Space Typhoon x1
Rising Air Current x1
Total =12

Traps:

Dust Tornado x1
Gust x1
Magic Cylinder x1
Magical Arm Shield x1
Mirror Force x1
Spiritual Wind Art – Miyabi x2
Waboku x2
Widespread Ruin x3
Windstorm of Etaqua x2
Total =14

TOTAL CARDS= 45

I want to add two Cyber Shields (spells) in my deck but to keep the same # of cards i have to take out two cards from my original deck. Which cards should i take out?
And should I even put Cyber Shields in my deck?
Please explain and rate with details