Is there any chance you can add Ender IO to the modpack?
Since the beginning of this modpack has a focus on Ender tech, Ender IO would make some sense in the setting, but also it would fill in a lot of gaps needed in the game. Firstly, the cosmetic uses of ender IO and it's capacity to concentrate several types of pipes into a single block (item transport pipes, RF pipes, AE2 pipes, Redstone signals, and fluid transport pipes, all in one space) would be extremely useful - with the added bonus of easily concealing them. Secondly, there are no easy mob transport mechanics in the game - I still don't fully understand the witch's hand (and if I understand anything at all, it's one of the four pathways in advanced witchery that allows for it), and Ender IO's soul bottles make that tremendously easier for the middle game (where it's mostly needed).
Also, could you consider adding in Extra Cells, and Thaumic Energistics as plug ins for AE2? High storage capacity for fluids and essentia would become very handy for endgame.