Sure!Normal mode is so hard for me,recently I and my friends developed a strategy in normal mode. You basically creep with whole team and frozen archer gets all pet kills,he then gets wind walk and stalls Dk and creepjacks him,hunter helps him find the DK,Frozen archer steals tomes/items and gives to team while team avoids DK and creeps on its own. When team reaches level 3,everyone pools architect all their gold,arch makes a deceiver,and builds a base at Ogre camp(red camp which guards one of the teleporters) ,while team distracts Dk and leeches exp off his summons.
When base is complete,team goes to creeping dragoons, and helps architect fend off DK attack when time expires,however this strategy relies hugely on medicine doctor,if he dies we cannot win,also if arch dies we cannot win, so it's actually hard to beat DK