Okay, let's get serious. What do you think it'll take to make a Battle Sister(rather a Palatine, I guess) a workable PC in Deathwatch? By that I mean a custom PC class that starts at Rank1 and goes to Rank 8 and which has its own advancement scheme.
A couple of thoughts from me: if we presume Rank1 DW to be roughly Sternguard equivalents, then I say the SoB needs to have at least (actually more) 20 wounds given that a Palatine has W2 in the TT. Perhaps they should have about 30 (as a result of faith and the Emps benevolence)
Some faith powers that grant Unn. Tough or Str for the combat perhaps.
If we roll with the idea of giving them slightly less powerful Bolters and Power Armour, then we need Faith talents that will make their attacks deal significantly more damage or their armour shield them significantly better. (The point of giving them slightly nerfed weapons/armour isn't to make them second-class overall but only because of plausibility reasons: the hulking Space Marines' gear should be a tad more powerful by itself. It should be the sisters faith instead that more than compensates for that if they pray for it.)
Duty Unto Death as a talent. At least Swift Strike as a starting talent.
Suggestions anyone?
Alex
Anyway, the tricky part is getting in a position where you can do that because a Palatine is no slouch.