I'd think
Fatal Push would be a bit better than
Time to Reflect, since you've got to bait them into the
exile with
Time to Reflect. If they've got something with an effect helping them that you want to remove you wouldn't be able to unless they play into your plan.
Scarab Feast in your sideboard would let you
exile something once you've removed it if it's something they can recur that would be a real problem.
Never // Return would fit here well. Planeswalker removal, gy hate for recursion, AND it will give you a zombie
two if you have your enchantment out.
I have a feeling 4x
Liliana's Mastery would help you much more than keeping the 2x
From Under the Floorboards.
Dread Wanderer and
Collective Brutality would be thing's I'd consider here as well. Controlling their hand can be important.
Transgress the Mind being in the sideboard should be a consideration as well in my opinion.