What I did is paired him with Axis Commander (lower MR - enhance damage) AND Warrior Axis bomber. Why is this important? First of all, 25% more to trigger extra turn on Horrow (Past ability), and I managed to achieve up to 10 extra turns (raw estimate, wasn't counting but really a lot). Second, Axis bomber applies marks on targets, and now when that bug with them healing the enemy is fixed, I noticed that they are consumed the number of times that equals the number of hits, meaning Horrow (or Assassin Golden son's hit, just to help you understand) will make more additional damage from Marks then Scythe or CR's Past AoE attack, can't remember the name... So with no Skill shards on Horrow, with four Holy, one Health ward and one Freeze, I think I really get admirable damage and number of turns. Plus, he fills Fury meter in like 4-5 hits. I really am a huge fan of CR (although I don't have one, but troopers helped me a lot), but I think that GR can be as good as him, in some other ways My humble opinion