I dunno wtf is going on .. but Fixers are fricken uber.
Personally my choice would be to balance the classes not by nerfing the fixer but by giving some love to the adventurer.
You pit a lvl 130 fixer against a lvl 170 advy, the fixer will wipe the floor with him every time,
The advy cannot sustain very much dmg.. we got time for one lickwounds.. no way can we cast a full heal in time to help us at all..
and the fixer simply roots you til you die.
debuff wont work cos the fixer just keeps rooting you and hitting you, til you're dead.