Are attacking hyper skills mainly designed for bossing only?

You got them all down from what I see.
You can move with the skill, but you cannot use other skills at the same time (besides FJ). I have no idea why it's got its own buff icon, but I love that because you can extend its duration and lower its cooldown

My brother got the short end of the stick in general since he has an I/L and we share an Evan. He only wishes that Lightning Sphere worked like Asura with time extension and mobility, or even if it only worked like Supernova or Distortion Field. He lays it out simply, "At what modern bosses am I going to have 8 full seconds of safety to cast the thing? I can't use it when most new bosses have mobility or OHKO! I can't even use it at Azwan." I told him there were plenty of options but he's pretty unfunded with lag problems and only runs Root Abyss or Azwan with me.

I think it's a pretty good skill for clearing out things like Zak and other multiparted bosses, but goodness is it gaudy. Actually most of them are. -Shrugs-

Edit: I forgot to mention he has a F/P too, "not enough reprocessing rate" is his critique on that. I guess that's fair, but the DoT makes up a bit of it.