Lol! I don't know that anything in this game is "necessary". But I will say the battles i lose most often in even fights are to players with 2 mages (Cath and Meh, Shayd and Cath, Shayd and Meh, Smoulder and any other mage, etc.). When they are starred and runed up right they are powerful. And I have also taken note that most of the top players ion my server have 2 mages in their lineup, or at least one EXTREMELY powerful one.