surfival is easy get a cleric and make sure all your units ahve lots of health, and if u use group bonus stuff, like warriors spell that increases damage by 20% it stays for the whole battle...
i used a warrior a cleric a conjurer and a archer and ig ot to 40 without a death. minus the summon creatures died
umm yeah this gamr is awesome minus a trade system would be good, but bad at the same time, cuz i know i would abuse it and like make a billion accounts and get all the starters or something like that, so yeah,