This is my take on a BLS/Gaia/Silent Swordsman Deck. I couldn't decide for one of them, so I made a Deck using all 3 Archetypes. There is a surprising amount of Combo Potential. But you can brick, which is very annoying at times.
Your Main Goal should be to get either Sky Galloping Gaia, BLS Envoy of the Beginning, Silent Swordsman LV7 or go overkill and summon BLS Soldier of Chaos to the field. Envoy of Chaos should either remain in hand or in the grave, in order to buff any BLS Monster.
If you're going for any of the Gaia Fusions, Summon Curse of Dragon, The Magical Knight Dragon first,then use it's effect to summon another Gaia Fusion and work from there.
If there are any ways to improve the Deck, let me know in the Comments.
Note: Arisen Gaia does NOT Special Summon any BLS monster except for BLS Sacred Soldier.