Seein where you're at, getting most mileage out of anygear might be pure necessity.
CE5 is rebuildable. Not meant to by manufacturers, but rebuildable. New wick, new coil, no prob.
As long as the rubber grommet at the base isn't scorched.
Sometimes it helps to add a little piece of wick above the coil. Sometimes it helps to remove it.
Depends on the juice you're using