Real problem is not even their damage
1 - They should disappear after a given amount of time if not killed, lets say maybe 5 minutes, could be less or could be more
2- 2 of them should not be able to be spawned near the same capture point
3- Reduce the range of their AoE pull
we already have baroness which is a pve element that can carry a match (fairly has decent pvp over it) however i dont think we should have multiple pve elements that can carry a pvp game mode in such an outrageous manner, these 3 suggestions i have given could be tunned down and dont necessarily need to all be applied