Radeka is one of the fights where you feel the difference between a mage team and a physical team : Radeka is immune to fire (the best element early on), and is highly resistant to other magic schools.
With a full physical team (ranger / 2h / rogue / summoner necro), the fight is simple : you assassinate Radeka on first or second turn. Then the real fight begins --> kill the god fucking beetles of doom.
To be fair, your topic is kinda meh : you ask for help but you don't inform us about your team comp ?
