Played against a Skaven player yesterday and learned a bunch more. Re-jigging the list so that the Manticore doesn't have to be as exposed to give me Ring of Hotek protection:
Dreadlord - 545
1+ Armor
Inverse Ward
Always S6 Weapon
Dragon
Master - 325
Regen Armor
Shield
Sea Dragon Cloak
Halbred
Manticore
5 Dark Riders - 117
RxB, Muso
5 Dark Riders - 117
RxB, Muso
5 Dark Riders - 117
RxB, Muso
5 Harpies - 55
5 Harpies - 55
5 Harpies - 55
5 Cold One Knights - 135
5 Cold One Knights - 176
Champion, Ring of Hotek
Cold One Chariot - 100
Cold One Chariot - 100
War Hydra - 175
War Hydra - 175
2247
I really wanted to get a Sword of Might on the Master, just for magical attacks, but it simply doesn't fit. The other big change is that the Lord no longer regenerates, so he's not quite as cannon proof as he was before, but generally you don't need that much, and the master is a bit better off. I may switch it back between the two of them after some more play testing.
Also, after a tiny bit more work I should have a project log of this army up, I've got quite a few conversions on it and honestly once this thing gets painted, assuming I can do it justice, it should look amazing on the table.