Yes, Rakshasa and Mages are all that makes Academy good; otherwise, it's a weak Castle. But I like the Titans' appearance – they are so stylish! :)
I understand that reading 19 pages can be tiring, but if you take the time to do so, you will find many posts discussing the strength and application of absolutely all units of the Academy (in my opinion, it is one of the strongest Castles).
Sincerely, Alan.