First: is it possible to use 2 imbues at the same time? Like lightning and fire?
Second: will this combination work? Activate fire imbue, fire off a fire nuke, then hurl the spear? Is this what everyone uses, or is the tactic flawed?
First: No, you can't use 2 short force skills at the same time. With the longer skills from 5 minutes or something it is possible, but I'm not sure bout that.
Second: It's better to go dual nuker if you want to keep the nuke attack, since nuke is an INT-favored attack while throwing the spear is a STR-favored attack.