Suggestion:
Damage reduction towards those with higher Telvar multiplayer than you, 15% per difference in multiplayer. (X1 deals 55% of dmg to X4, X4 deals 100% to all, X3 deals 100% to all but X4 which is 85%).
Imperial city was always supposed to be risk Vs reward kind of thing, but during the event a lot of players (I don't want to sound racist but usually nightblades) were committing to no risk vs maybe rewards activity (hunting other players when you have 0 Telvars on yourself).
I believe it will bring a more balanced feeling towards the place, with less hard feelings, because players will have to participate in the risk vs rewards on the PvP aspect, which was only risk vs reward in the PvE aspect.