Be careful with Bio-oil. The mineral oil part of it potentially harmful in how its formulated as it may be drawn into through the skin. I read enough earlier such that it even if issue is minor its not good enough a product to risk it.
Dry brushing to move stagnant lymph is probably the easiest and safest method to minimize cellulite. 1.5mm dermarolling if done correctly 6+ times can help a lot as it naturally restores the collagen matrix deep in the skin.