As an aside, I think these sorts of mechanical hard-blocks are the only way to truly control powergamers who will happily sacrifice (or go lax on) their RP when they think an imm isn't looking (and there's a big enough benefit to them). I understand there's not a lot in terms of immstaff right now, and the last thing I want is to create more of a policing job for them.

Besides: the more imms have to personally intervene in situations like this, the more likely it is you'll eventually make some sort of mistake, and then you've got an uproar on your hands. People are fallible. The best thing you can possibly do is put an almighty computer in charge of judging the situation, so there's no possible way it can be subjective. You really want to use that portal? Fine, enjoy being emetic'd.

I don't think anyone is willing to say that Battle doesn't get incredibly good powers, even if it's in question whether they're overpowered or not (I personally lean towards overpowered.) What's not in question is that their RP restrictions are meant to counterbalance how good it is to be able to walk around with constant dam redux, deathblow, borderline immunity to spells, and so on.

So, in keeping with that, let me offer up another idea that I think you should implement in the spirit of this:

COMMUNE SICKNESS
Given that Battleragers are, by their roleplay, not supposed to accept communes outside the shrine of Gods, give them the exact same vomiting/bad effects as portal sickness if they accept beneficial communes (i.e. anything requiring TRUST) but are not currently in a shrine. This shouldn't be hard to implement, since, AFAIK, areas are already flagged as shrines or not shrines.

It's far, far, FAR too common for certain powergaming Villagers to let Paladins and whatnot word of recall them when they're in trouble. This is terrible roleplay and it should come with consequences. I see it on basically every character I play, and I've never seen it punished.

Could do something similar for cabal powers like 'windwalk', but I'm not sure if this qualifies in the eyes of the immortals.