Forum:Brother's Crystal Beast Deck HELP!!

Hi my brother has been very sad lately because his crystal beast deck is losing a lot. I can't stand to see him upset so I'm asking for help. His deck contains: 44 cards + 15 card side deck = 59 cards total.

Monsters: 22

Sapphire Pegasus x1, Topaz Tiger x2, Amber Mammoth x1, Cobalt Eagle x2, Amethyst Cat x2, Ruby Carbuncle x3, Emerald Tortoise x2, GraviCrush Dragon x1, MagnaSlash Dragon x2, Dweller in the Depths x3, Sea Otter x1, CatNipped Kitty x1, Wall of Illusions x1,

Spells:12

Ancient City- Rainbow Ruins x1, Crystal Abundance x2, Crystal Tree x1, Crystal Blessing x2, Crystal Beacon x2, Crystal Promise x2, Tornado x1, Twister x1,

Traps:8

Last Resort x2, Gem Flash Energy x1, Crystal Raigeki x1, Trap Hole x2, Introduction to Gallantry x1, Two-Pronged Attack x1,

Side deck:

Winged Rhynos x1, Cobalt Eagle x1, Amethyst Cat x1, MagnaSlash Dragon x1, Crystal Blessing x1, Maji-Gire Panda x1, Introduction to Gallantry x1, Wall of Illusions x1, Monster Reborn x1, Gale Lizard x1, Giant Trunade x1, Rescue Cat x1, Crystal Pair x2, Crystal Release x1,

My brother doesn't have Rescue Cat, Crystal Pair, or Crystal Release yet. But he will be getting them soon Also, my brother is kinda new to this so he doesn't know many strategies or combos so any tips would be appreciated. Thanks!