Sorry i wasnt more clear most people have gotten on the Win by losing boat so the strategy (which has been posted since day 1) is pretty well known:
USE 1 character instead of three, to fight the Spawned mobs, they will eventually lose but chip down some of the opponents health.
Boom you got 55 Currency by losing.
When you eventually defeat the opponent youll get the other 350, so youll get 350 +55x however many times you lost before winning.
Make a bit more sense?
I guess an formula works better:
(X-3)55 + (350 x 3) (or 4 if you have Insane Asylum) this should be your gains every 4 or more hours once again not counting other sources of event currency
Where X= to the amount of Villains/Heroes/Vigilantes that you have and can fight
Bigger question:
What level are you and which act did you begin playing?
Freemium player?
Premum player?
Having both a freemium and premium town i can assure you it IS doable, my freemium town does not do friends visits plays 2-3 times a day and uses the win by losing strategy (not using any glitches) and is currently a couple thousand away from bouncing maggie, i did buy the Citizen Solar and Wind LAd combo but i feel id still be around this place even if i hadnt bought them.