|Nihimon Goblin Squad Member|
I don't understand why you would want to set both to the same target that defeats the purpose no?
I think I do understand why you want the system to stop you from setting them both to the same target, since it sounds like your primary concern is that it's currently too easy to accidentally use a harmful effect on yourself or a friendly.
I think it would make a lot of sense to have toggle options in the Settings Menu that controlled whether the system would allow you to target a Friendly as your Hostile Target (or a Hostile as your Friendly Target).
I can think of a couple of reasons why I would want to cast a harmful attack on a Friendly:
1. I want to test how much damage I'm doing against certain defensive builds;
2. I want to initiate PvP against a target the system currently thinks is Friendly, even though I know they are in fact an enemy.