[hippogryph]

Drop the Thunder fires, one auto-cannon dread and one librarian. This'll give you the points to add in three dakka preds to give a wall of AV 13 in front of your AV 11. then use the rest of your points to buy some mobile meltas. Because right now your list has no reliable way to stop raiders and the other issue is you're a major glass hammer that relies on getting first turn.