@RyanT &
@Johnoly have covered the topic well. Horizon allows 1 tech or 2 rec dives. They allow solo with a solo cert but not otherwise. They do not allow solo tech unless they know you well, so you’ll need a buddy or guide to do tech dives.
Given the depth & typically strong current, deco on the wreck is not really manageable. You are far more likely doing your deco on the line in a pretty stiff current. The mooring balls attach to the wreck at around 65’ or so. Now the viz is typically pretty good (but not always) allowing you plenty to see while on deco.
My double-dip rec dives on the Spiegel were all 40-45 min runtime with about 35 min on the wreck to a depth of 100-105’ using EAN30.