I could never use middle tree with anything other than shards of galnor. So long as you hit right, you can get 60% of your super back every time you use blade barrage

Have you tried them in Mayhem? All the lols, and the hate.

Honestly, I wouldn't know lol. I rarely do any sort of crucible, I am absolutely putrid in PVP. I've never encountered someone and had enough time to cast my super before I was dead, so I don't bother. I can barely even fire a weapon wildly in to the air before I die, never mind take half a second to accurately cast a super.