Is it hopeless to continue this game ?

[David3]

Quick description :

I am playing Atlantis Early Age, I have a tought army of 350 troops in Dendra Nigra (85) .. but 10 turn from what I have posted Ulm will bring 1500 troops to there + its seems that he will have the spell "Mass Protection" and my blade wind that did a good job until now will be useles.
+ even without the mass protection 7 blade winds per turn is still not good against 1500 trops ... (maybe in a siege with the castle walls - but ulm won't break in the fort). I waited 10 turns and with each turn they had more besiegeting units - until they got 1500 and I was the one who started the fight (break siege).

I tried to cast Earthquake 4 times with 4 mages but it still don't help (in the upcoming siege) + my mages won't retreat after castin earthquake (becouse they were fatigued ?) and slaind by ulm.

I know I need more powerfull spell that efect the entire battlefield or at least 25 areas ...

But I have 7 strong mages .. and research is good (I can go up to 250 per turn).

Maybe with the right spells I can win the upcoming battle ...
But I think it's a lost game - I will be supriesed even with you that know all the tricks in the bag of this game will find a way to win this .. win after all the newbie mistakes that I did .. It's too late ... or is it ?