Deathstroke: Battle in the Arrow Cave

What if Slade brought more torture and angst to Oliver and the team than the show delivered? What if the fight in the cave with Slade versus Team Arrow in episode 18 went a different way with Slade capturing/torturing them instead? AU after episode 18. Now multi-chapter. A different take from the TV show on how Slade takes revenge upon Oliver, with hints of Olicity throughout.