Sacred Haven of Debauchery

Well, it's easy to increase stats – you buy a griffin for mana prisms in the store, and that's it, you already have a thousand. And I leveled up approximately until April-May, plus Graal.
But skills are really expensive to upgrade – I upgraded charisma, somehow I managed to accumulate the resources, and then I couldn't even ascend Gil, because everything went to Arturia.