OK. There's egg on my face. I dislike rewinding history too far, but we're only one count or so in.
I'm also finding myself a bit unsure if we're in total agreement on Deflect. I think it's "Take a Standard action, designate a target (including yourself), that target acts like they took a Defend action with your Deflect rank as the Defense bonus". If so, that means you need to decide who gets the benefit when you use it, although I think you can use the Ready action. So in the future, I will interpret you saying that you'll use your Deflect action on the next target coming in as that Ready action for that one target. And you'd roll once for them rather than once per attack (of which there were two).
In this case, if we roll back history, the Gigantosaurs attack Evelyn, the readied action triggers, the roll of 17+12 gives Evelyn an effective defense of 29, and both attacks miss (the first one was a roll of a 19, not an automatic hit, only a Critical due to Improved Critical, and even the +2 from the Aid only brought them up to 28). Sorry, my fault for trying to adjudicate the action right before heading off to bed. I'll give Batgirl III an HP for my initial bad call. Nunya B, you have your choice in this case of either revising your post to indicate you weren't hit, or to take a Hero Point and we assume Fiat.
As for the people coming up from the basement, I'll resolve your actions in your initiative order.