Active and Defensive Piece Values

Assuming P=1,B=N=3,R=K=4.5,Q=9 as a "general" value
(which differ from teacher to teacher - I inserted
an approximate power for the king but trying to
exchange him isn't recommended :-)
- how would you rate the pieces in attack and defense?
E.g. a Q tied to defense wins no beauty contest.  

-- 
Hauke Reddmann <:-EX8    
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