Preheat oven to 325°F. Thoroughly coat a 10-cup Bundt pan with baking spray containing flour.
In a medium bowl, whisk together bourbon, oil, vanilla, and eggs until fully combined.
In a large bowl, combine cake flour, granulated sugar, dark brown sugar, baking powder, and salt.
Add softened butter to dry ingredients and beat until mixture resembles damp sand or cookie dough.
With mixer on low speed, add egg mixture in three additions, mixing after each addition.
Increase speed to medium and beat for about 2 minutes until batter is smooth, pale, and creamy.
Spoon batter evenly into prepared Bundt pan and smooth the top.
Bake for 55–60 minutes, until a wooden skewer inserted in the center comes out clean or with a few moist crumbs.
While cake bakes, melt butter with water in a saucepan. Stir in sugar until dissolved.
Add bourbon, limoncello, salt, and tea bags. Allow to steep, pressing tea bags occasionally.
Remove hot cake from oven and immediately poke holes across the surface with a skewer.
Pour about 3/4 cup glaze evenly over the cake and let rest in pan for 10 minutes.
Carefully invert cake onto a wire rack. Poke holes over top and sides.
Brush remaining glaze over cake until fully absorbed.
Allow cake to cool completely before slicing.