Thank you all for the comments and councel!
I am definitely thinking about going for Ultramarine rules since the Blood Ravens are a codex adherent chapter, Plus they have Tigurius. I was also thinking about Crimson Fists but Imperial Fists having tough Tacticals sounds really nice too.
I am definitely getting a couple of drop pods after I get my Rhino ready. I heard of a guy that had a squad with grav gun, heavy grav gun and a grav pistol is that any good? Like I said I am alien to the grav weapons cause I am more old school in the sense of not playing any
40k since 4th edition.
Ok so the list so far I am thinking could go like this:
Librarian:
8x
Tac squad with melta.
w 1x Rhino
8x
Tac Squad with grav gun, heavy grav gun and sargent with grav pistol.
w Drop Pod.
8x Devastators with 2 missile launchers and 2 Las Canons -maybe heavy bolters or plasma canons?
5x Sniper Scouts