I demo'd Techhead today on MG Dev, after he mentioned some trouble with the medi.  It would only give a couple hp at a time.  Then later, he had a couple of goons that couldn't chomp him.  Take a look:

http://mercenariesguild.net/files/373520

Not sure if this is something that may be fixed or not, but since it is a beta type server, I thought it'd be good to document.