The line running just behind the leader on the left is a primary service line, runs from pole to pole along the road there. Big THICK cable bundle, black and whites. It runs right up next to that leader. I didn't want to have anything to do with roping up in that leader and having to be near those lines. That's why I strapped the leaders together and ascended into the damaged one.
I've gotta go back probably early next week and prune that damaged leader, since when I was there all I did was damage removal. I'll probably strap them in two spots, then if my 12ga launcher is operational by then, use it to lob a line up and over the injured leader, further up.
I forgot to mention, TreeDimensional mentioned sounding the trunk using a mallet. It sounds pretty solid, I sounded it circumferentially up and down both leaders and they sounded okay.