My suggestion would be to go for Rage. Healer level 4 can wait. I don't use healer, so it's lowest on my priority. However, if you use it heavily, you might change the order.
Man you're sitting on so much of DE. Amazing!!!! I am taking it slow, one hero at a time. I try not to have both my heroes down at any point of time, the raids get harder without them, and the game gets slightly boring too.

Good work with the AD's and Xbows. I am yet to install the first xbow, and might not do it unless I've finished maxing everything I've right now, including new troops I'd be opening.
Been 8.5 is helping me a lot. I usually get rushed th9s or maxed th8s, and getting 2 is way too easy. Sometimes I manage to get 3 as well. The clan is helping me now, which is good. it felt so silent few days back. We're quiet a team now.
Good luck.