Hohner B2A high action

Hello,

I have some high action problems with a Hohner B2A. The saddles are set to the deck and I have still 1/8 on E at 17th fret. I usually go for 5/64 on that E. Any suggestions on how to reach a lower action? It's a neck thru (and it has a little hump at the last frets. But thats another problem :).

Cheers