What are the best the mechanical bleed types or the ecu hacking electric ones ?

Also I want to monitor my engine under higher boost whats the best device ?
AFR meter Knock Sensor EGT ? or all ?

IMVHO answer to the second question:
-Boost controller
-Knock sensor
-EGT
-AFR (must learn how to read it as when the EGT are high it shows wrong values).
JIM

cheers Jim,What are the best FC raisers ?

Sorry I am not experienced on this, ask the professionals (Bob, Pat, Pete, John etc)!
Cheers

any of the above guys around ?

All the gauges mentioned. Which FCD is best depends on your skills. The HKS FCD is quite good. A bleed valve off the MAP line would do similar. If you get it wrong your engine blows up, so if in doubt don't mess with fuel cuts.