I think it would be a great idea to organize this department. Divide it into sections as in, Set buildings, evolvable buildings, culture only, culture with pop, culture with road necessity, troop helpers, expiring buildings etc.
it would be nice. Any form of organization it would be welcomed and not only the Summonings section, also the Instants section. Why first page(s) must be the Artifacts which are actually the least used? Why they can't have their own tab or be on the last pages?