This isn't exactly the kind of weakness that is going to have Charlie too worried because you have flexibility to decide how to handle the revelation effect.
Let's say you exhaust all your allies during the upkeep phase; the result is you have a subpar next turn where you avoid tests and do some other stuff with your actions (draw, move, resource, etc). Sure, there will be times when there's an enemy or another really critical test that you need to deal with. But you can always take the damage/horror route if there is something important going on, not to mention passive effects on your allies are still going to work.
Just don't get caught with no allies in your hand or in play and only this card in your deck. That would be bad...