Vokur's Cane or the Dream Haunter?

I'm having trouble deciding between the 2 wands. I run a degen/anti-melee illusion build, with a 20/20 rockmolder as my focus item. My skill setup is the following:

Conjure Phantasm
Images of Remorse
Accumulated Pain
Ineptitude [E]
Clumsiness
Power Drain
Energy Tap
Resurrection Chant

I use the enchanter's set armor, which brings my energy pool up to 49 without the dream haunter. In your experience, would a build like this reason why I can't make up my mind is that energy is seldom a problem with my energy management skills, yet I also think that mesmers do not benefit from fast cast mods as much as other caster classes due to their attribute of fast casting. Keep in mind that this is what I run for pve. What do you guys think?

With this kind of build, I use Vokur's cane with the 20Rockmolder.

I find that energy is not a problem with this build, so, imo, the 20% fastcast is better. Moreover, i use a self-heal (EtherFeast) and i find it disturbing to lose 5energy when i need it the most (ie when my health is under 50%)

(Btw, i also use Epidemic instead of Clumsiness...)