I saw your team. Your main issue seems to be talismans. You have valhalla, light, asgard talismans and they are good. But you don't seem to have many other important sets that may be useful in LOL 15. Orbits, Niflheims or celestials are very useful to prevent incoming attacks because the boss wave goes first every time. You may try using magus Lilith with serenity (preferably a cosmic if you have it) to block damage + wrathchild with asgards. But I think you should focus on some other frontier dungeons (samurai dungeon is easier) or LOL 11 - 12 for now to get some awakening fragments and try max awakening either grim reaper Eddie, cyborg Eddie or wicker man.
Save your frontier coins for Alexander Eddie, Killer prime or van helsing Eddie. They are good and can help in many areas. The talismans you are missing will come around in future events. You can get a set then.