Here's a video against a decent lich player with the Rakan guy using super unit. They do a decent amount of damage but for being a 24 pack, with the exception of ninja, they suffer from the same problem as spearsman/swordsman (but with less HP so the situation is even worst). The turtle seems to be basically a big thing with a good HP just to buff other troops without any other use, and this thing costs 35 army cap (again, I may be wrong but that's what it looks like)
For the note, I don't know what's the amount of research the Rakan is using on the video, but it shows that the VII gold ninja is a 15 unit pack, having 4900 hp and 4400 attack, while my gold VI swordsman is a 24 pack with 5260 hp and 4800 attack each unit and on another account I have miners (12 unit pack) and my VII gold miners are 16.94k HP and 10300 attack each unit. So it's a very very very low stat on the ninja.