Daemonettes
Pros:
Warp Scream helps not only them, but any other unit of your army also in hth with the same enemy unit.
Rending is pretty darn sweet on the charge and can be used against high toughness opponents.
Cheap compared to Bloodletters
Sacred number is pretty small so you can again, get them for cheap.
Rending also works on tanks.
Cons:
No durability after the initial charge. Low toughness and negligible save means that typically they're only good for taking out one, possibly two squads or units.
Due to the nature of rending, they are quite a bit weaker when not charging unlike Bloodletters which are always dangerous.
Bloodletters
Pros:
High strength power weapons. Well Duh. Better in sustained combats than daemonettes.
Good armour and better toughness than daemonottes means that they will last longer in both hth and against shooting.
Will scare the crap out of people which might effect their game play.
Cons:
Much more expensive.
Since they don't get warp scream, they will be taking hits back at the same time they strike from most opponents with power armour.
Larger sacred number which makes them more expensive, but also more durable in combat.
Less useful against T 7 and T 8 models, although can still be used.
Less useful against tanks.
Basically its a toss up, and you should probably pick the type that most refelects the fluff aspect of your particular Black Legion list. Ie: Do you have anyone with either mark already in it?
For my money, I'd go with daemonettes as a bargain, but if you were fighting say lots of terminators a big unit of bloodletters is the shiznick.
Pros:
Warp Scream helps not only them, but any other unit of your army also in hth with the same enemy unit.
Rending is pretty darn sweet on the charge and can be used against high toughness opponents.
Cheap compared to Bloodletters
Sacred number is pretty small so you can again, get them for cheap.
Rending also works on tanks.
Cons:
No durability after the initial charge. Low toughness and negligible save means that typically they're only good for taking out one, possibly two squads or units.
Due to the nature of rending, they are quite a bit weaker when not charging unlike Bloodletters which are always dangerous.
Bloodletters
Pros:
High strength power weapons. Well Duh. Better in sustained combats than daemonettes.
Good armour and better toughness than daemonottes means that they will last longer in both hth and against shooting.
Will scare the crap out of people which might effect their game play.
Cons:
Much more expensive.
Since they don't get warp scream, they will be taking hits back at the same time they strike from most opponents with power armour.
Larger sacred number which makes them more expensive, but also more durable in combat.
Less useful against T 7 and T 8 models, although can still be used.
Less useful against tanks.
Basically its a toss up, and you should probably pick the type that most refelects the fluff aspect of your particular Black Legion list. Ie: Do you have anyone with either mark already in it?
For my money, I'd go with daemonettes as a bargain, but if you were fighting say lots of terminators a big unit of bloodletters is the shiznick.
