I also took another crack at Culdcept Saga tonight and finally beat the first board, this time with just over 5000 magic versus her 2000. I pretty much did it the same way she did to me last time, too — I built up a well-defended square to level 4, and she landed on it twice, costing her a huge amount and forcing her to sell off a lot of her properties.
Luck still plays a huge role in these early boards, but hopefully it won’t be too long before I’ll have a more powerful card deck. I’ve seen recommendations that I should be playing some short ‘versus’ games as well just to build up my deck, rather than just sticking to the main campaign.