To win a bit more easily try and get theses cards in your deck:

Level 1-4

Vorse raider
Gemini elf

Level 5-6

Cyber-tech aligator
Summoned skull

Level 7+
Blue eyes white dragon
B. Skull dragon
Suijin
Kazejin
Sanga of the thunder
Barrel dragon

Spell/trap/magic cards

Umiruka
(any that give you more LP
Or take away LP from your opponent)

Thats all for now

Superjoegoal

Deck,
3 : blue eyes white dragon
1 : battle ox
1: dark magician
1 : the snake hair
1 : rouge doll
1 : cocoon of evolution
1 : urbay
1 : crawling dragon #2
1 : king of yamimaki
1 : armored zombie
1 : faith bird
1 : raigeki
2 : hinotama
2 : final flame
1 : swords of revealing light
1 : black luster soldier
1 : 7 colored fish
1 : man eater bug
1 : the bistro butcher
3 : gemini elf
1 : dark elf
1 : black luster ritual
1 : sengenjin
1 : dark magic ritual
1 : magician of black chaos
1 : fissure
3 : trap hole
1 : polymerization
1 : monster reborn
1 : pot of greed
1 : change of heart
1 : paralyzing potion
3 : neo the magic swordsman
1 : share the pain
1 : mystical space typhoon
1 : premature burial
1 : buster blader
3 : vorse raider
3 : wolf axwielder
1 : wing weaver
3 : warrior dai grepher
1 : book of moon