Toughness is a nice counter to the Crimson Rite damage. I'd probably take that at 8, then grab the two levels of revised Ranger.

Plus, those HPs will come in handy over the next few levels, while the Archtype would only come into play at the very end of your campaign, it sounds like.

Granted, the same could be said about getting the Ranger levels sooner, but each level is only adding to your damage output, which as a BH/Ghostslayer shouldn't be a problem, whereas the HP loss is.