Thanks for your help. I will try boosting the magic shield to see if it can hold until i can get past the gate. Thanks for the magic shield mechanic, but I am still trying to determine how to use it effectively. Also I chose the warlord. If there are any skills that would help getting past the gate, that would be very helpful.
I am not sure how I fell about the inability to merge units. I may have to play a bit more to get used to it. I just don't like entering a battle with a recently and heavily damaged unit that I need to keep on the sidelines until I can replenish it's numbers.