I adore ele staff in solo pve. It's so versatile. The swiftness skill of Air #4 is awesome because it's a shout in disguise, but with a shorter cooldown. You can perform the skill next to a mob and still be out of combat. So good.
I enjoy playing Staff + Arcane utilities. It's almost like I'm playing the skill bar backwards, with Arcane skills being my DPS and Staff skills kinda sorta playing support. Instant blasts and crits on demand from my utility bar? Yes, please!
Then I got my Tempest unlocked and sacrificed my staff + Arcane for warhorn + shouts. I'm forcing myself to enjoy warhorn since none of my characters used that weapon. Playing warhorn + shouts so far has not been fun. I'll continue to tinker around, probably drop the shouts.
Well it's not like you need to use Warhorn. Staff is still one of the best even as Tempest. The Shout utilities can be pretty useful at times but outside of "Wash the Pain Away" (which is pretty good), none of them are that good that you should force yourself to use them.