Well, It was quite easy, All that i have left is to buy the last few upgrades to Max out everything and get the final achievement, and then beat the last 4 challenges on EPIC difficulty and everythings done completely,
Sylph, Untamed Beast, Succubus, Phantom Ghost, Valkyrie, Were-Tiger all Level 5
Viegraf, Popo, Kera all level 5,
Shield Level 1
You can get through Epic Difficulty and all the challenges no problem, no need for anything else
 "Epic War 4"){kind=icon}