Same problem here
The only thing i can do is the Jester and Ranger Quest
Edit: Ok heres How to become Blade
1.Do the the quest until yu must collect traces of heros but collect 7 of
the dark ones and 6 of the other ones now put one of the dark ones in your bank
and go to radion and choose the knight quest (its the left one). now drop the item you gained to become knight
and take the trace of heros from your bank(The dark one for blade) from this moment on you
can become blade in the normal way just finish all the quests and tada finnaly blade xD