Very interesting read. I'd be curious as to your evaluation of having a third defender instead of Whisper (I know that would probably facilitate a total revamp of the list) as it seems she was secondary in damage output to your two deltas in your last couple of games. My thinking would then be that a third defender active in the fight would contribute to an even faster win?
I've played triple defenders before on a competitive level. They're consistent, but I feel this list has a higher ceiling. This one also takes a lot more skill to fly. Having triple defenders would make the games I win faster, but I like the point structure in my list too much to give up.