Just to compare. Let's say bob the mook has a WP of 35, and you have a PR3 WP 45 force weapon-wielding bamf. He rolls a 100, you roll and 01. You win by 44 (54, after including the effective psy rating of 2 for the fettered focus), for 5 DoS (6 DoS), he fails by 65 for 7 DoF, for a difference of 12 (13) degrees. That's a bonus 6d10 damage, cos you got 6 DoS, innit? Am I doing it wrong? Anyway, bob the mook asplode.
You win by 44 (54, after including the effective psy rating of 2 for the fettered focus test of +10), for 5 DoS ( 6 DoS after the bonus), he fails by 65 for 7 DoF, for a difference of 12 (13 after bonus) degrees. That's a bonus 6d10 damage, cos you got 6 DoS , innit?
Bold for emphasis. The DoFs didn't modify the result. Originally I thought they might, looked it up to verify, and recognized that they did not. Had a brain fart for a bit, there.
Good to know about Nemesis weapons being power fielded. Those stats from Daemon Hunter? Bear in mind that cross-game stats rarely translate cleanly. Look at the pre-errata Astartes Heavy Bolter and compare it to the Legion Heavy Bolter for a great example.
Also, I think a good party of renegades with a bunch of xp under their belts and a solid collection of acquisitions ought to be able to have the chance to take on a Bloodthirster- or even Kairos Fateweaver. After a game has gone on long enough, I want my players to have daemon weapons, terminator armour and high quality force fields- because I'm going to challenge them.
Black Crusade is a fairly high-level game by design, and I try to treat it as such. I approach it with the mentality that I learned from Exalted, rather than the Shadowrun mentality appropriate to Dark Heresy.