I dont even see how its possible to lose against a defiler with a burglar now a days, i can finish every 1v1 against a defiler with full morale and power.
As for reavers...
Avoid taking an impale with more than 2 bleeds. Knives out or cc when you feel an impale coming ( they try to stack bleeds before using it ). Trick range works wonders, dont forget to glee.
I do it for the lulz. ~SnH~
People @ turbine/WB are a huge tease, but dont worry they end up screwing you on every update/expansion.
" When enough scrubs get together, they accomplish great things "