Arelith

But not flame weapon?

Flame weapon is included.

I'm not able to have both flame weapon and an imbue on my sword. I've tried both putting the flame weapon and the imbue on first and each overrides the previous.

Cast the imbue on the weapon, then cast flame weapon on your self, not the weapon.

Ohhhh. Is that how it's done?

Same for gmw? Cast gmw on myself not on the weapon?

So for gmw>essence>imbue it would be :
Gmw on self
Essence on weapon
Imbue on weapon?