Both of them will enhance your experience ten fold against the AI so I would get them, right now there is no offer for just the 2 together, you have to buy them seperately on impulse or all together with the orginal sins as well in the Trinity Pack.

It is probably worth it, though sadly there doesn't seem to be any combo deal. $20 for better AI, defense platforms that can actually stand up to a fleet, a diplomactic victory option and many other things makes it better than the average $30 expansion pack if you ask me.