The reason I add the Red Hunters Libbi to the
GKSS witch will probably combat squad (especially the one with the 2x Psycannons) is to give them the chapter tactics .. Now I don't know what are the rules for the Contemptor Mortis Dread or where I can find them but I got 4x Dreads (I really like them) 2x Plyfledreads for high
STR range shooting and 2x
CC with a lot of Heavy Flamer action

so I think I couldn't/shouldn't add another one . Maybe if I find the rules I 'll give it a try

.. I'm not really a fun of
SM Bikers , that I can assure you! Plus I don't have any models..
Anyway that are my thoughts but thanks for your advices m8 ! You really helped