I remeber when this game came out on armor games.... i built a level that never stopped i know that it never stopped because i left it running for 3 days
tactic tha works pretty well: level up the dark archer (aka miranda silverbow) and skeleton archers the whole way, then just summon alot of the archers and summon her. PS. resurrect help some to if you level it up because it summons skele archers too.