1) Is Flame Barrier's defensive power effected by the harness it's wearing, i.e. does a shadow harness only block shadow damage? If so then it would seem that the normal harness would provide the best balance of offense and defense, since most monsters resist their own damage type.
2) Do the extra fire orbs provided by the Scorching Barrier ultimate increase the defensive power or is it only an offensive buff?
3) Does the stun of Concussive Firebolt proc often enough to be more useful than the extra AoE of Meteoric?
4) Frenzied Firestorm seems like the obvious choice but I'm curious how much extra damage Explosive Firestorm would add. Also, does the damage bonus of Frenzied apply if you are already at Max damage?
1. It doesn't block damage, it increases your resistance. You still take damage, just less with this skill active.
2. It makes the area around yourself much more dangerous by increasing the fireball's size and decreasing the space between each fireball. It's like how vana has 2 stages where fireballs revolve around him, the second one being more dangerous because there is less space between the fireballs. Nick's post doesn't say anything about being stronger defensively.
3. I wouldn't expect applying stun to be as good as hitting a few extra monsters.