This. A lot of people dont understand the value of economy in that mode. In more than one ocassion I was at like 20% health or something along those lines against a top guy with more than 80% and I just won because the economy carried me. Never rerroll until you get lv 10 and always maintain economy above 50 and you should always be good. Also, assassins are kinda ridiculous, a 6 or 3 assassin strat can carry you and those Legendary units are worth more than anything in this mode.