Gift of Reason for Eater of the Dead?

[Vicious Love]

Endoperez said:
He will. But if you catch the final form with Charm/Enslave Mind/Hellbind Heart, you can Gift of Reason him and he stays (as he only becomes independent after his last "evolution" and the mind-controlled one already went through it). It's an oversight of a kind, but not too powerful... The Eater of the Dead has low magic resistance, so mages can just Soul Slay/Disingterate/something else it.

That didn't work for me, last time I tried. I enslaved him in his final, unfettered form, and he went rogue again one round thereafter.