machaka for newbies

[lapo]

Hello,
I just started playing (SP) Dominions 3 with Machaka MA. I'm using as Pretender an imprisoned Lord of Fertility with N9/W9 Dom 4. I expand pretty soon with my black hunters, but in the middle game I'm usually attacked from several AI Player with huge armies (300 units)...(Playing Glory of Gods with every race). PD of Machaka is useless.
Furthermore being a newbie I do not have a clear magic strategy. Which magic path and which spells would be the best?

strategy advices ?

thanks