Two things that I think should be changed:
1)
Arrows of Justice should be removed and replaced with copies of
Boros charm. The charm has way more utility: it keeps your creatures by making them indestructible, has a four damage
burn and gives one of your creatures double strike. In general, this will be greater than or equal to the other card and it's cheaper.
2)
Mark for Death should be replaced with
Pit Fight.
Pit Fight is used out of combat and it doesn't matter if your creature is tapped or pacified, the spell still works and it's only two mana as opposed to Mark's four.
Hope this helps!