You can't include a DC Dread without a unit of 5 DC.
I'd swap the DC Dread for a Furioso with Blood Talons in a Pod.
Drop the Terminator Armour on the Librarian & grab a jump pack & go with a RAS.
Give both the RAS a Power Fist & 2 Meltaguns.
Drop the Tactical squad for a unit of Devastators with 4 x MLs.
Drop the Scouts & use their points to add 2 Sang Priests with packs for each RAS.
Grab a MM/HF Land Speeder or two (points depending).