<span class="link_user">@CovikLaFlaire</span>,
I would go for the Addetives Bud Explosion (Z) Stimulus (X) and AromaBoost (Y),
But if you yellowing of leaves in early to midflower, your soil could need some nitrogen boost.
For that part B is execelent since it also holds alot of calcium, crucial for strong and hard flower production.