Both have almost the same size.
Both have almost the same color.
One kills the player.
Other helps the player.
So they shouldn´t be so similar. Many times vengeance circle is invisible to the player: Usually when it hits an uneven terrain but when both buffs are active is very confusing to the players that have little time to think if they should run from it or run to it. So please fix it.
Solutions:
Vengeance circle could have an vertical bar so players could see it or be 3D instead of 2D.
Magus circle or vengeance circle should have a different color.
Any other tip?