Is it even a good idea to have two imbues? I'd like to hear some discussion on that.
You can have two imbues on your skillbar, they just can't be stacked on a target. You can chain them, though. I've noticed that you can activate a second imbue just as one is about to expire and it will come up right after the first one expires. Gotta' time it just right, though... watch the little duration bar at the bottom of the active skill icon.
I have ice and fire imbues on my lvl 15 character. I started with ice, but I added the fire to see what it's like... the sound and visual effect as well as damage. For the low level monsters, I'll sometimes throw the fire imbue up to take down the last 1/4 or so health. Another ice imbue would do the trick, but it's cool to see both.
Freeze 'em and finish 'em with fire. Heheh... that rolls rather nicely off the tongue.
I'm thinking I'll have to delevel one when I hit lvl 20. Unless, there's a good reason for having two imbues?