play on the easier levels then build it up, people say it's a "noob" thing to do but honestly it helps, when i haven't played in ages i go onto normal mode
Survival is just a joke I can barely beat normal mode on that, and it's always been like that when i did survival in doa3 the best i could get was like 3-5 wins. i even lost at rookie as marie rose (then again i can only really play her on tag) the survival AI is just insane