For this trial deck, you would pick Lizard Soldier Undeux.
For this build, the main Vanguard unit that you should consider using are Dragonic Overlord and Dragon Monk, Goku.
- For Dragonic Overlord, you can Counterblast 3 as Vanguard, and hope to drive check 3 times into some critical triggers, and hopefully, they would be unsuccessful to block the onslaught, but that's highly unlikely.
- For Dragon Monk, Goku, you can Drive Check a Grade 3, and retire one of your opponent's Rear Guards.
There's 4 Critical Triggers, 4 Stand Triggers, 4 Draw Triggers, and 4 Heal Triggers.
- 12 Grade 0 Shields
- 4 Draw Triggers
- 13 Grade 1 Shields
- 11 Grade 2 Shield/Interceptors.
4x Demonic Dragon Mage, Raksha
4x Lizard Soldier, Ganlu
4x Dragon Dancer, Monica
4x Dragon Monk, Genjo
Lizard Soldier Undeux
4x Flame of Hope, Aermo
4x Embodiment of Armor, Bahr
2x Dragon Monk, Gojo
2x Demonic Dragon Madonna, Joka
2x Wyvern Strike, Jarran
4x Dragon Knight, Nehalem
4x Berserk Dragon
4x Wyvern Strike, Tejas
4x Dragonic Dragon Berserker, Yaksha
2x Dragonic Overlord
Dragon Monk, Goku
For more information, here's another link that you can follow. Anyway, if you have any questions, leave a comment.