Question about Moro undead strategy

[Metathron]

Howdy,

Owing to the comfort that is the resurrection skill, I'm using Moro + black knights for the first time in my impossible paladin game.

I've also recruited vampires due to the morale benefits I have and the fact they can resurrect themselves, but I'm now wondering if this is such a good idea, since the unit itself is rather feeble and resurrection will bring back only one stack - I'm assuming the knights will require it. If it is a good idea, then perhaps I could recruit ancient ones as well.

So, do you guys think taking extra undead along with the knights is a good idea (bone dragons as well, perhaps?) or do you prefer to solo with them? Was thinking of attacking Hagni with just these two, but not sure if it's doable.

Any other dos & don'ts for the Moro strategy also appreciated.