Noob Question: Capture Enemy Castle

[das123]

Hi,

I just got Dominions and have read through the manual (the best manual I have seen for any game btw). I have played the tutorial but not completed it (just played through the turns in the manual) and I have played a couple of short random games (small map) 1 vs 1 (AI Easy Defensive) where I am playing Middle Age Man.

I now have a loose grasp on setting up army orders etc and have progressed to the point where I can win battles against the easy AI in the provinces except when it comes to storming the castle.

My units besiege the castle and batter down the gate. I then give the order to storm the castle but invariably the Prenteder God is way too powerful for my units and even though I can wipe out all other forces, the God is practically impossible to defeat.

Can someone give me some clues as to what I can try please?

My basic army setup is:
Castellan (Prophet) with many longbowmen and some spearmen.
Mother of Avalon with Air Helm and heaps of Air Gems casting Wind Guide and Aim (does Aim help the longbowmen?) from amidst the longbowmen.
Mounted Commander with troop of Knights of Avalon.
Priest casting Bless.
Lord Warden with troop of Wardens of Avalon.

There is still enemy Dominion (about 4) in the target province.

My Pretender God has level 4 in Fire, Air and Nature to get the various Bless bonuses (does the Pretender God need to be with the army for the troops to get the bonus?).

Thanks.