Here is the promised Space Marine bracket! Marneus Calgar, unsurprisingly, won. What is surprising, however, is that the only one to beat him was Cassius! Very interesting! A few reasons for that were that Marnues couldn't insta-kill him and Cassius has Feel No Pain.
Here's the bracket with each round's win-loss ratio for each opponent (click to enlarge).
- Marneus Calgar was given the Armor of Antilochus
- Tigurius uses Smite in the shooting round and Quickening and Might of the Ancients in the Assault round.