1850 Blood Angels - Need feedback

So here is the finalized list that I have been playing for the past 3 months in preparation for Adepticon. Adepticon is a week and a half away, and I am looking for any last minute list advice.

I have played this list around 20 times now and like it. Sometimes that blinds me from seeing glaring weaknesses.



HQ:
1 Mephiston, Lord of Death 250 points


1 Librarian in Power Armour Blood Lance; Shield of Sanguinius) 100 points




Elite

1 Terminator with Lightning Claws (Terminator Armour; Lightning Claws (pair)) 215 points
3 Terminator with Thunder Hammer & Storm Shield (Terminator Armour; Thunder Hammer & Storm Shield)
1 Sergeant (Terminator Armour; Lightning Claws (pair))


1 Sanguinary Priest in Power Armour with infernus pistol 115 points
1 Sanguinary Priest in Power Armour




Troops:[/b]
3 Assault Squad 165 points
1 Assault Marine with Meltagun
1 Sergeant
1 Razorback Lascannon and TL Plasmagun)


3 Assault Squad 165 points
1 Assault Marine with Meltagun
1 Sergeant
1 Razorback Lascannon and TL Plasmagun)


3 Assault Squad 130 points
1 Assault Marine with Meltagun
1 Sergeant
1 Razorback ; Twin-Linked Heavy Flamer)


7 Assault Squad 235 points
1 Assault Marine with Meltagun
1 Assault Marine with Meltagun
1 Sergeant Power Fist x1




Heavy Support

5 Devastator Squad Missile Launcher x4 130 points

5 Devastator Squad Missile Launcher x4 130 points

1 Stormraven Gunship; Extra Armor; 4x Bloodstrike Missiles; Twin-Linked Multi-melta; Twin-Linked Lascannon 215 points

Total Roster Cost: 1850