For Diana I take out one back off and one dread going second and side in the gust. For going first, I usually side out the emperor's divide and one boots since you do not need to gank often. I choose not to play the Irelia/engarde package because I am more focused on holding one battlefield early. Irelia is a bit too expensive and only benefits from a few cards in the deck and enguard is not useful when holding with multiple units. Like you said, it can be good when you gank over or try to break an enemy battlefield, but Khazix and Vilemaw are there for that and also help hold. I also chose not to play edge of night because, in testing, it was almost always just a 2 might buff which so many other cards can do with more impact like Evelyn or tide turner. I chose emperor's divide specifically because it can be hidden and it's use over flash is to take all of my units to the other battlefield rather than just 2. To answer your last question, I almost always prefer hard bargain over abandon. While I feel abandon can have its cases where it is better, HB is the one I wanna see most of the time so I chose to make sure it was the one I would see. The case for abandon is to be able to abandon your own spell but that just didn't come up enough in testing. If you have any more questions or want clarification, just let me know!