Attacks by hordes can't normally be dodged or parried, which makes sense considering the sheer number of individuals attacks in that one "horde attack". But if anyone could dodge or parry horde attacks, Temple Assassins seem like a prime candidate. In the background, wargame and Dark Heresy: Ascension they are consistently noted as being able to dodge insane numbers of attacks.
So a few options come to mind for Temple Assassin PCs in Deathwatch (or any other 40krpg game where Hordes are being used):
1. Don't allow Temple Assassins any dodges or parries versus horde attacks. The default and doesn't sit right with me for the reasons I stated above.
2. Allow Temple Assassins one dodge or parry versus every horde attack. Seems a bit strong but not utterly implausible. Also has the advantage of simplicity.
3. Allow Temple Assassins one dodge or parry versus a horde attack in exchange for a number of reactions they would normally have under Ascension rules (say five for the sake of argument). Possibly fairer, but more complex.
Does else anyone have thoughts on these options?