When I was referring to FC buffing SF and aura, I was referring to the changes over the years with the build... at one time, aura was too long to cast and had a long cool down and the bubble had a 10 minute (or more cant remember) cool down as well and the spec wasn't nearly as good.
With the constitution, I was referring to the difference in my build is taking the 5 points out of reducing the cooldown on call lightning and using 5 in constitution instead, better backing for hits. (comparison to Gank's build before my first post).
Using elemental fury as a spell is actually very useful with the insta cast LS, with 100% crit and elemental fury hits for over 4k, may of time hitting for upwards of 5k. With how much melee and soldiers are playing, elemental fury gets a lot of use.
I know there is a fangs build with AOE, but I consider it more useful with LS, mainly considering you have the range... no traps and less cc's to worry about. You don't have the impact of hitting 4+ people at the same time and destroying them in situations, but you can completely lock people down and get out of cc's very easily.
I really enjoy the AOE spec, but over the course of bad teams and changes to classes, I now look at how can I help the team, and lock down the other team as well; instead of just close range AOE.
What really made me mad about AOE spec is that bubble... 5 min cool down for a non-reliable bubble. With fangs its a nice alternative but only for single target melee situations... which is why LS with a single target approach is more appealing for me.