whats the best broadhead sharpening tools?

[LKH]

for 2 blades, I don't think you can beat the Tru-Angle system.  

For three blades I use a flat diamond after the big flat file.

Resharpen in the field w/small two sided stone we glued together.  One is fine stone, other side is ceramic.  Fits in case w/buck 450 folder.  Multipurpose.

[flatlander37]

I'm with Ben.  I use the Snuffer Tamer with success.  Woodsmans I use a 12" file and stones, then strop on a belt or knife sheath.