Magic Spells and Ritual

[VALENT]

some questions: 1)is there some basic spells for all the nations i have to research in every class of magic?some spells important to research?
2) for the ritual is there some ritual important to research?does the ritual aplly all the time of the game? is ritual important to use?
3)for items and objects which give some strengh to my pretender or mages:is it importantto develop?does it will be important to use?
4)i am Ermor+Ashen: to take some ennemy fortress ihave to use ritual and magic?
5)for the use of directives to my pretender in "recruit army", ihave see many orders. what the difference between them? and which is the most important of orders to use?
please help me for a beginner.i am a littlre lost between all theses orders.
thinks to answer me
phil