Not even close.

Displacement is physical damage that scales with INT and you Magic Damage from your weapon. Your RDM auto's scale with STR and thats it. They receive no benefits from your weapons damage number since its a caster weapon. Casting spells also pause your auto-attack timer. A base RDM auto is around 50~ damage non-crit. Displacement is hitting for around 2500 base in these vids.