Well, A LOT!
I'm probably going to average twice an hour, so 800 deaths wouldn't be unrealistic. Although I'm also shooting for 0, lol. I'm usually careful in surveying the situation, but I'm never shy to give it a try even if it feels like certain death. At least it was a good fight =)
I probably won't play on max difficulty if it still just means bullet sponge max. If it actually does something to increase the difficulty, then I will. Otherwise I'll mod it harder.